Power and Energy Meter Interfaces with External Readout


  • Compact Power Meter Interfaces with Various Output Connection Options
  • Red C-Series Connector for Quick Sensor Exchange
  • Ideal for Manufacturing Environments

PM101

Photodiode and Thermal Power Sensor Interface with USB, RS232, and Analog Operation

Compatible with C-Type Sensors (Not Included with Console)

PM100USB

Power and Energy Sensor Interface with USB Operation

PM102A

Thermal Power and Position Sensor Interface with USB and Analog SMA Operation

PM101R

Photodiode and Thermal Power Sensor Interface with USB and RS232 Operation

PM103U

Photodiode Power and Pyroelectric Energy Sensor Interface with USB Operation

Related Items


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Power Meter Selection Guide
Sensors
Photodiode Power Sensors
Thermal Power Sensors
Thermal Position & Power Sensors
Pyroelectric Energy Sensors
Power Meter Consoles
Digital Handheld Console
Analog Handheld Console
Touchscreen Handheld Console
Dual-Channel Benchtop Console
Complete Power Meters
Power Meter Bundles
Wireless Power Meters with Sensors
Compact USB Power Meters
Field Power Meters for Terminated Fibers
USB Interfaces, External Readout

Click to Enlarge
All power meter interfaces have a DE-9 input connector. The PM101, PM102, and PM103 series interfaces also feature status indicator LEDs and a reset button to reboot the interface.
Optical Power Meter Utility
Click to Enlarge
Optical Power Monitor Software GUI: Power Measurement
Thermal Position Software Functionality
Click to Enlarge
Optical Power Monitor Software GUI:
Position Trace Using with a Thermal Position & Power Sensor

Features

  • Compact Interfaces to Enable PC Control of Power Meter Systems
  • Compatible with Thorlabs' C-Series Sensors:
    • PM101 Series: Photodiode and Thermal Power Sensors
    • PM102 Series: Thermal Power and Thermal Position & Power Sensors
    • PM103 Series: Photodiode Power and Pyroelectric Energy Sensors
    • PM100USB: Photodiode Power, Thermal Power, and Pyroelectric Energy Sensors
  • Optical Power Monitor PC Software Available (See Software Tab for Details)

These interfaces provide communication between an attached sensor and a PC or other external control unit. They are designed to be controlled via an external device or operated autonomously using the analog output; there are no controls or display screens.

The PM101 series power interfaces are compatible with Thorlabs' C-Series photodiode and thermal power sensors, the PM102 series is suitable for use with our C-Series thermal power and thermal position & power sensors, and the PM103 series is suitable for use with our C-Series photodiode power and pyroelectric energy sensors. These interfaces support several options for control and digital readout, including USB 2.0, RS232, UART, and analog output, depending on the model. The PM103 series is able to acquire data with a much higher readout rate of 100 kilosamples per second (kS/s) versus the maximum rate of 1 kS/s of the PM101 and PM102 series. Our PM100USB interface is controlled and provides digital readout via USB 2.0 only and is compatible with Thorlabs' C-Series photodiode, thermal power, and pyroelectric energy sensors. See the table below and the Feature Comparison tab for a summary of technical data unique to each item #.

The compact housings used for these interfaces can be post-mounted using ECM100 or ECM225 aluminum clamps; alternatively, multiple units can be stacked using the EPS225 plastic clamp.

Sensor Compatibility
See the Sensor Selection tab or see below for our selection of power and energy sensors. All of the interfaces on this page allow "hot-swapping," or changing the connected sensor while the unit is turned on.

Computer Control
The power meter interface and connected sensor are controlled through a PC running Thorlabs' OPM Software (see the Software tab for details). The program offers configurable panels for the display of various numeric parameters that can be selected by the user, such as power or energy, their minimum or maximum values, and their units. The GUI also offers data logging with graphical display, tabular display for up to eight power meters, and a histogram representation of measurement statistics within a pre-determined period. Measured data can be stored as a .csv file. A driver set for integration with 3rd party software or customized applications is provided as well.

System Design
A selectable bandwidth of either 20 Hz or 100 kHz offers more flexibility and adaptability to specific measurement tasks while using photodiode sensors. The higher bandwidth is optimal for pulse detection; the lower bandwidth offers better accuracy. When used with our C-series thermal sensors, the interfaces can apply thermal time constant information stored in the sensor's connector to minimize the response time of the system.

Fiber Photodiode Power Meter Option
The compact, integrated S15xC Series fiber photodiode sensors can be connected directly to a PM101x, PM103x, or PM100USB power meter interface to create a compact, single-unit fiber power meter. This avoids handling limitations due to cable movements, making this device ideal for multi-sensor applications that require remote control. The fiber sensors are compatible with exchangeable adapters for FC/PC, FC/APC, LC, SC, and ST fiber connectors; they are not compatible with our PM102 series interfaces.

Recalibration Services
Recalibration services are available for our thermal and photodiode power sensors, thermal power and position sensors, pyroelectric energy sensors, and power meter interfaces. We recommend recalibrating your Thorlabs sensor and interface as a pair; however, each may be recalibrated individually. To order this service for your photodiode power sensor, thermal power sensor, pyroelectric sensor, or interface, scroll to the bottom of the page and select the appropriate recalibration service Item # that corresponds to your sensor or interface. Recalibration of a thermal position sensor can be requested by contacting Tech Support. Recalibration of a single-channel power meter interface is included with the recalibration of a sensor at no additional cost.

Sensor Upgrade Service
Thorlabs' sensors and interfaces are not compatible with previous generation power meter consoles and sensor heads, respectively. We offer a sensor upgrade service if you want to use your existing sensors with a new power meter console or interface. Note: upgraded sensors will be incompatible with previous generation power meter consoles and new sensors converted to work with previous generation consoles will not be compatible with the power meter interfaces sold here. Please contact our Tech Support team for details.

Quick Comparisona
Item # PM101 PM101A PM101R PM101U PM102 PM102A PM102U PM103 PM103A PM103U PM100USB
USB Operation
Autonomous Operation with Analog Output - - - - -
RS232 Operation - - - - - - -
UART Operation - - - - - - - -
Non-Volatile Memory -
Configurable as Trigger Input/Output - - - - - - - - -
Sensor Compatibility
Photodiode Power - - -
Thermal Power - - -
Thermal Position & Power - - - - - - - -
Pyroelectric Energy - - - - - - -
  • See the Specs, Feature Comparison, and Connectors tabs for details on all available models.
Sensor Compatibility
Item # PM101 Series PM102 Series PM103 Series PM100USB
Sensor Compatibility
Compatible Sensor Typesa Photodiode Power and
Thermal Power		 Thermal Power and
Thermal Position & Power		 Photodiode Power and
Pyroelectric Energy		 Photodiode Power, Thermal Power,
and Pyroelectric Energy
Max Photodiode Sensor Current 5 mA N/A 10 mA 5 mA
Max Thermal Sensor Voltage 1 V 1 V N/A 1 V
Max Thermal Position Sensor Voltage N/A 1 V N/A N/A
Max Pyroelectric Sensor Voltage N/A N/A 200 V 100 V
Photodiode Sensor Current Input
Units W, dBm, W/cm2, A N/A W, dBm, W/cm2, A W, dBm, W/cm2, A
Current Measurement Range 6 Decades:
50 nA, 500 nA, 5 µA,
50 µA, 500 µA, 5 mA;
Range Selectable in W,
Sensor Dependent		 N/A 21 Ranges:
nA: 2, 4, 10, 20, 40, 100, 200, 400;
μA: 1, 2, 4, 10, 20, 40, 100, 200, 400;
mA: 1, 2, 4, 10;
Range Selectable in W,
Sensor Dependent		 6 Decades:
50 nA, 500 nA, 5 µA,
50 µA, 500 µA, 5 mA;
Range Selectable in W or A,
Sensor Dependent
Current Display Resolution 1 pA / Responsivity Value (A/W) N/A 1 pA / Responsivity Value (A/W) 1 pA / Responsivity Value (A/W)
Current Measurement Uncertainty ±0.2% Full Scale (5 µA - 5 mA)
±0.5% Full Scale (50 nA)		 N/A ±0.2% Full Scale (400 nA - 10 mA)
±0.5% Full Scale (2 nA - 200 nA)		 ±0.2% Full Scale (5 µA - 5 mA)
±0.5% Full Scale (50 nA)
Analog Bandwidth DC - 100 kHz
(Dependent on Sensor and Settings)		 N/A DC - 150 kHz
(Dependent on Sensor and Settings)		 DC - 100 kHz
(Dependent on Sensor and Settings)
Wavelength Correction nm (A/W) N/A nm (A/W) nm (A/W)
Beam Area Setting Diameter 1/e2 or Rectangular x,y N/A Diameter 1/e2 or Rectangular x,y Diameter 1/e2
AD Converter 16 bit N/A 16 bit 16 bit
Thermal Sensor Voltage Input
Units W, dBm, W/cm2, A N/A W, dBm, W/cm2, V
Voltage Measurement Range 9 Ranges:
2, 4, 10, 20, 40, 100, 200, 400, 1000 mV;
Range Selectable in W,
Sensor Dependent		 N/A 4 Decades:
1, 10, 100, 1000 mV
Range selectable in W or V,
Sensor Dependent
Voltage Display Resolution 1 µV / Responsivity Value (V/W) N/A 1 µV / Responsivity Value (V/W)
Voltage Measurement Uncertainty ±0.5% Full Scale (10 mV - 1 V)
±1% Full Scale (2 mV, 4 mV)		 N/A ±0.5% Full Scale (10 mV - 1 V)
±1% Full Scale (1 mV)
Analog Bandwidth DC - 10 Hz
(Dependent on Sensor and Settings)		 N/A DC - 10 Hz
(Dependent on Sensor and Settings)
Wavelength Correction Sensor Dependent; nm (V/W) N/A Sensor Dependent; nm (V/W)
Beam Area Setting Diameter 1/e2 or Rectangular x,y N/A Diameter 1/e2
Pyroelectric Sensor Voltage Input
Units N/A N/A J, J/cm2, W, dBm, W/cm2, V J, J/cm2, W, W/cm2, V
Voltage Measurement Range N/A N/A 13 Ranges:
mV: 20, 40, 100, 200, 400;
V: 1, 2, 4, 10, 20, 40, 100, 200;
Ranges Selectable in J,
Sensor Dependent		 4 Decades:
0.1, 1, 10, 100 V
Range Selectable in J or V,
Sensor Dependent
Voltage Display Resolution N/A N/A 100 μV / Responsivity Value (V/W) 100 µV / Responsivity Value (V/J)
Voltage Measurement Uncertainty N/A N/A ±0.5% Full Scale (1 V - 200 V)
±1% Full Scale (20 mV, 400 mV)		 ±0.5% Full Scale
Trigger Level N/A N/A 3% - 90% Full Scale 0.1 % to 99.9 % Full Scale
Repetition Rate N/A N/A Single Shot - 80 kHz,
Dependent on Sensor		 3 kHz
(Dependent on Sensor and Settings)
Wavelength Correction N/A N/A Sensor Dependent; nm (V/W) Sensor Dependent; nm (V/J)
Beam Area Setting N/A N/A Diameter 1/e2 or Rectangular x,y Diameter 1/e2
AD Converter N/A N/A 16 bit 16 bit
Sensor Temperature Measurement
Supported Temp. Sensor Thermistor
Temp. Measurement Range -10 to 120 °C -10 to 120 °C -10 to 120 °C -10 to 80 °C
Sensor Interface
Connector DE-9 Female
  • See below for sensor specifications.

Device Characteristics
Item # Dimensions
(L x W x H)		 Operating
Temperature		 Storage
Temperature		 Weight Display Type Display Screens GUI Refresh Rate
(Dependent on
PC and Settings)		 Battery DC Input
for Power
PM101
 96.5 x 57.2 x 25.4 mm3
(3.80" x 2.25" x 1.00")		 -20 to 50 °C -40 to 70 °C 0.16 kg (0.35 lb) External PC;
Windows® Application
or Driver Set		 Windows® Application
Software Provided		 1000 Hz No USB Cable
Provideda
PM101A 100.0 x 57.2 x 25.4 mm3
(3.94" x 2.25" x 1.00")
PM101R 95.9 x 57.2 x 25.4 mm3
(3.78" x 2.25" x 1.00")
PM101U 93.6 x 57.2 x 25.4 mm3
(3.68" x 2.25" x 1.00")
PM102 96.5 x 57.2 x 25.4 mm3
(3.80" x 2.25" x 1.00")		 0 to 40 °C -40 to 70 °C 0.16 kg (0.35 lb) 1000 Hz
PM102A 100.0 x 57.2 x 25.4 mm3
(3.94" x 2.25" x 1.00")
PM102U 93.6 x 57.2 x 25.4 mm3
(3.68" x 2.25" x 1.00")
PM103 96.5 x 57.2 x 25.4 mm3
(3.80" x 2.25" x 1.00")		 0 to 40 °C -40 to 70 °C 0.15 kg (0.33 lb) 1000 Hz
PM103A 100.2 x 57.2 x 25.4 mm3
(3.94" x 2.25" x 1.00")
PM103U 93.6 x 57.2 x 25.4 mm3
(3.68" x 2.25" x 1.00")
PM100USB 93.1 x 60.4 x 28.7 mm3
(3.67" x 2.38 " x 1.13")		 0 to 40 °C -40 to 70 °C 0.15 kg (0.33 lb) 300 Hz
  • PM101, PM102, and PM103 can also be powered by the DA-15 connector. See the Connectors tab for specifics.

Compatible Sensor Overview

Sensor Type C-Series Photodiode Sensors,
Photodiodes (Max 5 mA)		 C-Series Thermal Power Sensors,
Thermopiles (Max 1 V)		 C-Series Thermal Position
& Power Sensors		 C-Series Pyroelectric Sensors,
Pyros (Max 100 V)
Compatible Interfaces PM101, PM101A, PM101R, PM101U,
PM103, PM103A, PM103U,
PM100USB		 PM101, PM101A, PM101R, PM101U,
PM102, PM102A, PM102U,
PM100USB		 PM102, PM102A, PM102U PM103, PM103A, PM103U,
PM100USB
Wavelength Ranges 200 nm - 5.5 µm 190 nm - 20 μm 190 nm - 20 µm 185 nm - 25 μm
Power / Energy Ranges 100 pW - 20 W 10 μW - 200 W 0.5 mW - 50 W 10 μJ - 15 J

For a full list of the sensor head specifications please visit the Photodiode Power Sensors, Thermal Power Sensors, Thermal Position & Power Sensors, or Pyroelectric Energy Sensors pages. For other information, please contact Tech Support.


Item # PM101 PM101A PM101R PM101U PM102 PM102A PM102U PM103 PM103A PM103U PM100USB
Photo
(Click to Enlarge)
Sensor Compatibility
Photodiode Sensors - - -
Thermal Power Sensors - - -
Thermal Position & Power Sensors - - - - - - - -
Pyroelectric Sensors - - - - - - -
Connectors
C-Series Sensor DE-9 Connector
USB Connector Lockable Lockable Lockable Lockable Lockable Lockable Lockable Lockable Lockable Lockable Not Lockable
Serial DE-9 Connector - - - - - - - - - -
SMA Output Connector(s) - 1 Analog Power Output - - - 3 Ports: Power, X Position, and Y Position - - 3 Ports: AO1, AO2, and Digital I/O (Configurable as External Trigger Input) - -
DA-15 Universal Connector with
2 Auxiliary I/O Ports		 - - - - - GPIO Ports Also Configurable as Trigger Input (Pin 2) or for Pass/Fail Analysis (Pin 3) - - -
Control Options
USB Operation
RS232 Serial Communication - - - - - - -
UART Operation - - - - - - - -
Analog Output(s)
Sensitivity Configurable Analog Outputa - - - - -
Real Analog Outputa - - - - - - - -
Other Features
Power Supply via USB
Power Supply via DA-15 (+5 to +36 V) - - - - - - - -
"Hot-Swapping" Permitted
Non-Volatile Memory -
Current Measurement Ranges Six Six Six Six - - - Twenty-One Twenty-One Twenty-One Six
Voltage Measurement Ranges Nine Nine Nine Nine Nine Nine Nine Thirteen Thirteen Thirteen Four
Reset Button -
External NTC Thermistor Input - - - - - - - -
Adjustable Baud Rate - - - - - - -
  • Refer to the PM101, PM102, and PM103 series manuals for information on these operating modes.

Analog Output

The PM101 has two analog output ports assigned to pins in the DA-15 connector: AO1 and AO2. The signal from AO1 is a voltage value proportional to the selected measurement range, but is not wavelength or zero corrected; it is not sent through a DAC. AO2 delivers a measurement-range-independent voltage which is DAC controlled; the signal is proportional to a value set by the user through the OPM software or the SCPI/driver commands. The PM101A analog output functions in the same way as the AO2 output from the PM101, but access is provided via an SMA connector. See the manual for details.

The PM102 has three analog output ports assigned to pins in the DA-15 connector: POWER, X POS, and Y POS. The signal from POWER is a measurement-range-independent voltage which is DAC controlled; the signal is proportional to a value set by the user through the OPM software or the SCPI/driver commands. The signals from X POS and Y POS are voltage values proportional to the relative position of the beam on the sensor surface and a value set by the user. The PM102A analog outputs function in the same way as the analog outputs from the PM102, but access is provided via SMA connectors. See the manual for details.

The PM103 has two analog output ports assigned to pins in the DA-15 connector: AO1 and AO2. The signal from AO1 is a voltage value proportional to the selected measurement range, but is not wavelength or zero corrected; it is not sent through a DAC. AO2 delivers a measurement-range-independent voltage which is DAC controlled; the signal is proportional to a value set by the user through the OPM software or the SCPI/driver commands. The PM103A has two analog output ports with SMA output connectors. The functions match the function of AO1 and AO2 of the PM103 respectively. See the manual for details.

The PM101, PM102, PM103, PM101A, PM102A, and PM103A can be operated autonomously if only an analog output is required; only power needs to be supplied to the unit.

Sensor Connector (All Models)

D-Type Female

DB9 Female

Sensor Connector Pin Assignments
Pin PM101 Series PM102 Series PM103 Series PM100USB
1 +5 V (Drive Max 100 mA from this Pin) +5 V (Drive Max 50 mA from this Pin)
2 DO NOT USEa
3 Analog Ground for PD Anode,
Thermal Sensor, and NTC		 Analog Ground for Thermal Sensor
and NTC		 Analog Ground for PD Anode,
Pyroelectric Sensor, and NTC		 Analog Ground for PD Anode,
Thermal, and Pyroelectric Sensor
4 PD Cathode Thermal Sensor Input Quadrant 3 PD Cathode PD Cathode
5 N.C. Thermal Sensor Input Quadrant 4 Pyroelectric Sensor Input Pyroelectric Sensor +
6 Digital Ground for EEPROM and 5 V Output
7 Present: Sensor Recognition, NTC Input.
Connect this Pin via a 1 kΩ to 10 kΩ Resistor to Pin 3 (AGND) to Enable a Custom Sensor
8 Thermal Sensor + Thermal Sensor Input Quadrant 1 N.C. Thermal Sensor +
9 N.C. Thermal Sensor Input Quadrant 2 N.C. N.C.
  • Pin 2 is only used to communicate with the EEPROM Digital I/O on Thorlabs sensor heads and must not be used with custom sensors. Connecting this pin may cause the device to malfunction.

USB 2.0 Port (All Models)

USB Type Mini-B

USB Mini-B

USB Type Mini-B to Type A Cable Included

Item # PM101 Series PM102 Series PM103 Series PM100USB
Remote Interface Type USB 2.0a
Connector Mini-B USB, Lockable Mini-B USB, Lockable Mini-B USB, Lockable Mini-B USB
Measurement Speed Up to 1000/s Up to 500/s 1 kS/s + 100 kS/s Bulk Mode N/A
  • While this port can provide power to the unit for all models, PM101, PM102, and PM103 can also be powered by the DA-15 connector (see below).

Serial DA-15 Connector (PM101, PM102, and PM103 Only)

DA-15 Female

DA15 Female

DA-15 Connector Pin Assignments
Pin PM101 PM102 PM103
1 Pin for Alternative Power Supply with 5 to 36 VDC
2 I/O 1 General Digital Input/Output Port; 3 V Logic (Output), 5 V Tolerant for Input
3 I/O 2 General Digital Input/Output Port; 3 V Logic (Output), 5 V Tolerant for Input
4 Analog Output;
-0.25 to +2.5 V per Measurement Range		 Software Configurable Analog Output for Beam Power;
0 to 2.5 V		 Analog Output;
-0.25 to +2.5 V per Measurement Range
5 Software Configurable Analog Output;
0 to 2.5 V		 Software Configurable Analog Output for X-Position;
-2.5 to 2.5 V		 Software Configurable Analog Output;
0 to 2.5 V
6 N.C. Software Configurable Analog Output for Y-Position;
-2.5 to 2.5 V		 N.C.
7 RS232 to PC Terminal RxD
8 RS232 to PC Terminal TxD
9 Power Supply Ground
10 Ground
11 Ground
12 Ground
13 Ground
14 NTC Thermistor Input; Measurement Range 0.1 to 100 kΩ
15 RS232 Signal Ground
Item # PM101 PM102 PM103
RS232 Communication
DA-15 Pins 7 and 8
Baud Rate 9600 - 230400 Bit/s
Default: 115200 Bit/s
Settings N1S
Measurement Speed Up to 200/s Up to 200/s 200/s + 100 kS/s Bulk Mode
Analog Output, Configurable
DA-15 Pin(s) 5 4 (Power), 5 (X-Position), and 6 (Y-Position) 5
Signal Gain Signal Configurable Power (Configurable in V/W),
X-Position & Y-Position (Configurable in V/µm)		 Gain Signal Configurable
Voltage Range 0 to 2.5 V Power: 0 to 2.5 V;
Positions: -2.5 V to +2.5 V		 0 to 2.5 V
Accuracy ±1%
Bandwidth 1 kHz
Analog Output, Not Corrected
DA-15 Pin 4 N/A 4
Signal Amplified Input Signal - Not Corrected N/A Amplified Input Signal - Not Corrected
Voltage Range 0 to 2.5 V N/A -0.25 to 2.5 V
Accuracy ±3% N/A ±3%
Bandwidth Up to 100 kHz,
Dependent on Sensor and Settings		 N/A Up to 1 MHz,
Dependent on Sensor and Settings
Auxiliary Temperature Control
DA-15 Pin 14
Supported Tempearature Sensor Thermistor NTC 0.1 - 100 kΩ, B-Value: 1000 - 9999 K
Temperature Measurement Range -40 °C to +200 °C (NTC Dependent)
Digital Control Pins I/O
DA-15 Pins 2 and 3
Signal 2 x GPIO 2 x GPIO 2 x GPIO or Configurable as
Trigger Input/Output, Pass/Fail Analysis
Power Management
DA-15 Pins 1 and 9
DC Input +5 VDC to +36 VDC

Serial DE-9 Connector (PM101R Only)

DE-9 Female

DB9 Female

Item # PM101R
RS232 Communication
DE-9 Pins 2 and 3
Baud Rate 9600 - 230400 Bit/s
Default: 115200 Bit/s
Settings N1S
Measurement Speed Up to 200/s
DE-9 Connector Pin Assignments
Pin PM101R
1 N.C.
2 RS232 to PC Terminal RxD
3 RS232 to PC Terminal TxD
4 N.C.
5 Ground
6 N.C.
7 N.C.
8 N.C.
9 N.C.

SMA Connector(s) (PM101A, PM102A, and PM103A Only)

Item # PM101A PM102A PM103A
SMA Connector(s)
(Click to Enlarge)
Analog Output, Configurable
SMA Connector(s) Analog Output Power, X-Position, and Y-Position AO2
Signal Gain Signal Configurable Power (Configurable in V/W),
X-Position & Y-Position (Configurable in V/μm)		 Gain Signal Configurable
Voltage Range 0 to 2.5 V Power: 0 to 2.5 V;
Positions: -2.5 V to +2.5 V		 0 to 2.5 V
Accuracy ±1%
Bandwidth 1 kHz
Analog Output, Not Corrected
SMA Connector N/A N/A AO1
Signal N/A N/A Amplified Input Signal - Not Corrected
Voltage Range N/A N/A -0.25 V to 2.5 V
Accuracy N/A N/A ±3%
Digital Control I/O
SMA Connector N/A N/A Digital I/O
Signal N/A N/A GPIO or Configurable as Trigger Input/Output

Standard Photodiode Sensor Mounting Options

S120C and FC Fiber Adapter
S120C and S120-SMA Fiber Adapter
S120C and FC Fiber Adapter
S120C and S120-FC Fiber Adapter

Thorlabs Standard Photodiode Sensors compact design allows easy integration into existing setups. Typical mounting configurations including post, cage, and lens tube options are available. Shown on this page are several different choices for mounting these sensors.

The Standard Photodiode Sensors are compatible with all S120-xx Series fiber adapters. FC/PC and SMA adapters are shown on the right. Adapters for FC/APC, SC, LC, and ST connections are also available.

S120C
S120C and Flip Mount
S120C
S120C and Flip Mount

Flip up mounts are convenient for quick power measurements from a static location. The sensor can be placed in the path of the laser beam for the power measurement and flipped down during normal operation of the system.

FM90 Right Angle Flip-Mounts are shown to the right. Thorlabs also offers the TRB1 Articulating Post Mount. The lockable articulating mount offers almost unlimited positioning of the sensor head. The articulating mount is shown on an S13xC Slim Photodiode Sensor below.

S120C and quick release 30mm Cage System
S120C and QRC1A Quick-Release Mount
S120C and quick release post mount
S120C and KB1P Quick-Release Mount

The Standard Photodiode Sensors also feature SM1 threaded connections on the front face. The SM1 theading provides easy mounting to 1" lens tube systems and quick release mounts.

Shown to the right are the KB1P Quick-Release Post Mount and QRC1A Quick-Release 30 mm Cage Mount. Both mounts feature SM1 threaded connections to the sensor heads.

Note: Due to the thickness of the S12xC sensor, the QRC1A and CP44F (shown below) quick release mounts can only be fully removed from the cage system by backing them off an open end. The two mounts are easily removed from the cage system if only three cage mounts are used. See the picture on the right.

S120C and quick release 30mm Cage System
S120C and CP44F Quick-Release Mount

Thorlabs also offers the CP44F 30 mm Cage Plates with Quick-Release Mounts. These mounts feature magnetically coupled mounting for easy and repeatable mounting.

Note: Like the QRC1A, the CP44F can not be removed from a closed cage system.

Slim Photodiode Sensor Mounting Options

S130C inserted into 30mm Cage System
S130C Sensor in a 30 mm Cage

Thorlabs' Slim Photodiode Sensors are designed to fit into space-restricted environments such as 30 mm cage systems and optic-dense free-space arrangements.

Shown to the right is a S130C Sensor inserted into a 30 mm cage system. The application shown highlights the ease with which the sensor can be inserted into the cage, and the minimal space needed to take a power measurement.

The Slim Photodiode Sensors may also be mounted on a TRB1(/M) Articulating Mount. This mount allows repeatable insertion of the sensor into tight optic arrangements. After the measurement is made, the sensor may be rotated out of the beam path for normal operation.

Compact Slim Photodiode Sensor Mounting Options

S116C inserted into 16mm Cage System
S116C Sensor in a 16 mm Cage

Thorlabs' Compact Slim Photodiode Sensors are designed to fit into even tighter spaces such as 16 mm cage systems, our slotted Ø1/2" lens tubes, and other optic-dense free-space arrangements.

Shown to the right is an S116C Sensor inserted into a 16 mm cage system. The application shown highlights the ease with which the sensor can be inserted into the cage, and the minimal space needed to take a power measurement.

The compact slim photodiode sensor has two 8-32 (M4) taps for post mounting. One tap mounts the sensor horizontally, as seen to the right, and one allows it to be mounted vertically. The sensor may also be mounted on a TRB1(/M) Articulating Mount. This mount allows repeatable insertion of the sensor into tight optic arrangements. After the measurement is made, the sensor may be rotated out of the beam path for normal operation.

Microscope Slide Photodiode Sensor Mounting Options

S170C Post Mounted with RA90
S170C Mounted on a Post
The S170C may be post mounted via the 8-32 (M4) tap in the side of the housing.
S170C in a Microscope Slide Holder
S170C in a Microscope Slide Holder

The S170C microscope slide power Sensor is designed so that it can be mounted directly in a microscope slide holder. The 76.0 mm x 25.2 x 5.0 mm sensor head has the same footprint as a standard microscope slide and is compatible with most standard upright and inverted microscopes. The photo to the right shows the power sensor flipped over so that the engraved back of the housing can be used for alignment.

This power sensor also has an 8-32 (M4) tap for post mounting. In the photo to the far right, an RA90 is used with two Ø1/2" posts to mount the sensor head in a horizontal orientation.

Integrating Sphere Photodiode Sensor Mounting Options

S140C and S140-BFA Bare Fiber Adapter
S140C and S140-BFA Fiber Adapter
S140C and S120-FC Fiber Adapter
S140C and S120-FC Fiber Adapter

Thorlabs' Integrating Sphere Photodiode Sensor provides a low loss cavity for diverging, non-uniform, or off-axis beam measurements. These integrating spheres are ideal for all fiber based applications due to the beam divergence at the end of the fiber.

Shown to the right is an S140C Integrating Sphere with S120-FC Fiber Adapter. Also shown is an S140C with a S140-BFA Bare Fiber Adapter. The Bare Fiber adapter features a mounting clamp and light shield to decrease interference from ambient light.

Compact Fiber Photodiode Sensor Mounting Options

S150C and PM100D
PM100D with S150C Sensor
S150C and PM100D
S150C Sensor with FC and SMA connectors

Thorlabs' Compact Fiber Photodiodes are the ideal choice for a portable, fiber coupled power meter. The S15xC sensors are compatible with a wide variety of fiber connections. PM20-xx adapters are available to couple FC, APC, SMA, ST, SC, and LC connectors with the sensors. Shown to the right is a S150C Sensor with FC and SMA connector adapters.

Shown to the far right is a PM100D console with S150C sensor connected to a FC connectorized optical fiber. This setup is ideal for portable in the lab and in the field use.

Pyroelectric Energy Sensor Mounting Options

ES220C
ES220C mounted on 30 mm Cage Rods

Thorlabs' Pyroelectric Energy Sensors are ideal for measuring pulsed sources. These pyroelectric sensors provide direct energy readings for those sources. The sensors are designed to handle medium to high energy pulses from Excimer, YAG, and other high power lasers.

Mounting options include post (with insulating adapter) and cage configurations, shown to the right.

Compatible Power Meters

  • PM100A Analog Power and Energy Meter Console
  • PM100D Digital Power and Energy Meter Console
  • PM101 Series Power Meter Interfaces with External Readout (Version 2.0 or Later)
  • PM102 Series Power Meter Interfaces with External Readout (Version 2.1 or Later)
  • PM103 Series Power Meter Interfaces with External Readout (Version 3.0 or Later)
  • PM100USB USB Interface Digital Power and Energy Meter
  • PM400 Capacitive Touchscreen Power and Energy Meter Console
  • PM160, PM160T, and PM160T-HP Wireless Handheld Power Meters with Bluetooth® Technology
  • PM16 Series Compact USB Power Meters

The Optical Power Monitor software is not compatible with the PM320E Benchtop Power Meter.

Optical Power Monitor

The Optical Power Monitor GUI software features power measurement, readout from up to eight power meters, and remote wireless operation.

For details on specific software features, please see the user manual.

Users interested in the legacy Power Meter Software can find it by visiting the software page.

The PM101 Series Power Meters are only compatible with version 2.0 or later. The PM102 Series Power Meters are only compatible with version 2.1 or later. The PM103 Series Power and Energy Meters are only compatible with version 3.0 or later.

Software Download

Optical Power Monitor GUI Software for Touchscreen, Handheld, and USB-Interface Power Meters

Features

  • Operate up to Eight Power Meters Simultaneously
  • Record and Analyze Measurements in Real Time
  • Intuitive Analog Display and Graphing Modes
  • Configurable Long-Term Data Logging
  • Also Supports Position Measurements with Thermal Position & Power Sensors
  • Compatible with USB and Bluetooth® Connections

The Optical Power Monitor software GUI enables seamless control of up to eight power meters that are connected via USB, RS232, or Bluetooth® wireless technologya. The latest software, firmware, drivers, and utilities for these power meters can be downloaded here.

Multiple data measurement and analysis functions are integrated into the GUI package. The interface offers a user-friendly design with minimal use of color and low brightness that is ideal use in dark lab environments while wearing laser safety glasses. Measured data can be displayed in real time as a simulated analog needle, digital values, line graph, or bar graph. Continuously logged and short-term measurements can be recorded for data viewing and analysis at a later point. A built-in statistics mode analyzes measured data and continuously updates to reflect new measurements within the pre-determined measurement period. Beam position measurements are also supported when used with our thermal position & power sensors.

The Optical Power Monitor software package installs the GUI, which then can be used to control the touchscreen, handheld, or USB-interface power meters. Firmware updates for supported power meters are also available. Programming examples and drivers for interfacing with our power and energy meter consoles using LabVIEW, C/C++, Visual C#, and Python are installed with the software; refer to the manual for details.

Please note that the Optical Power Monitor Software uses different drivers than the Power Meter Utilities Software and Thorlabs recommends using the new driver TLPM.dll. For users who wish to use the legacy Power Meter Software or use custom software designed using the older PM100D.dll driver, a Power Meter Driver Switcher program is included for easy swapping of the installed driver between the two versions.

a. The PM160, PM160T, and PM160T-HP power meters are equipped with Bluetooth® connections.

Optical Power Meter Utility
Click to Enlarge
Power Measurement Mode: Set up and configure up to eight power meters.
Optical Power Meter Utility
Click to Enlarge
Power Tuning Mode: Simulated analog needle and digital measurement value provided. Delta Mode, enabled above, shows the fluctuation range during the measurement period.
Optical Power Meter Utility
Click to Enlarge
Power Statistics Mode: Calculate numerical statistics for a pre-determined measurement period. The panel displays the analyzed values in a bar graph and the results as numerical values.
Optical Power Meter Utility
Click to Enlarge
Position Tuning Mode: Tuning mode can be used with a thermal position & power sensor to aid in beam alignment.
Optical Power Meter Utility
Click to Enlarge
Position Statistics Mode: Statistics mode also provides aggregate information for thermal position & power sensors.
Optical Power Meter Utility
Click to Enlarge
Data Logging: Enable long-term measurement and simultaneous recording from up to eight power meters. Save data as .csv files for later processing while measurement results are displayed in a graph in real time.
Handheld Power Meter with iPad
Click to Enlarge
The PM160 wireless power meter, shown here with an iPad mini (not included), can be remotely operated using Apple mobile devices.

This tab outlines the full selection of Thorlabs' power and energy sensors. Refer to the lower right table for power meter console and interface compatibility information.

In addition to the power and energy sensors listed below, Thorlabs also offers all-in-one, wireless, handheld power meters and compact USB power meter interfaces that contain either a photodiode or a thermal sensor, as well as power meter bundles that include a console, sensor head, and post mounting accessories.

Thorlabs offers four types of sensors:

  • Photodiode Sensors: These sensors are designed for power measurements of monochromatic or near-monochromatic sources, as they have a wavelength dependent responsivity. These sensors deliver a current that depends on the input optical power and the wavelength. The current is fed into a transimpedance amplifier, which outputs a voltage proportional to the input current.
  • Thermal Sensors: Constructed from material with a relatively flat response function across a wide range of wavelengths, these thermopile sensors are suitable for power measurements of broadband sources such as LEDs and SLDs. Thermal sensors deliver a voltage proportional to the input optical power.
  • Thermal Position & Power Sensors: These sensors incorporate four thermopiles arranged as quadrants of a square. By comparing the voltage output from each quadrant, the unit calculates the beam's position.
  • Pyroelectric Energy Sensors: Our pyroelectric sensors produce an output voltage through the pyroelectric effect and are suitable for measuring pulsed sources, with a repetition rate limited by the time constant of the detector. These sensors will output a peak voltage proportional to the incident pulse energy.
Console Compatibility
Console Item # PM100A PM100D PM400 PM320E PM101
Series		 PM102
Series		 PM103
Series		 PM100USB
Photodiode Power -
Thermal Power -
Thermal Position - - - - - -
Pyroelectric Energy - - -

Power and Energy Sensor Selection Guide

There are two options for comparing the specifications of our Power and Energy Sensors. The expandable table below sorts our sensors by type (e.g., photodiode, thermal, or pyroelectric) and provides key specifications.

Alternatively, the selection guide graphic further below arranges our entire selection of photodiode and thermal power sensors by wavelength (left) or optical power range (right). Each box contains the item # and specified range of the sensor. These graphs allow for easy identification of the sensor heads available for a specific wavelength or power range.

Photodiode Power Sensors
Thermal Power Sensors
Thermal Position & Power Sensors
Pyroelectric Energy Sensors
  • The response time of the photodiode sensor. The actual response time of a power meter using these sensors will be limited by the update rate of your power meter console.
  • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s) when the natual response time is approximately 1 s or greater. As the natural response times of the S415C, S425C, and S425C-L are fast, these do not benefit from accelerated measurements and this function cannot be enabled. For more information, see the Operation tab here.
  • With intermittent use: maximum exposure time of 20 minutes for the S401C, otherwise maximum exposure time is 2 minutes.
  • All pyroelectric sensors have a 20 ms thermal time constant, τ. This value indicates how long it takes the sensor to recover from a single pulse. To detect the correct energy levels, pulses must be shorter than 0.1τ and the repetition rate of your source must be well below 1/τ.

Sensor Options
(Arranged by Wavelength Range)

Sensors by Wavelength

Sensor Options
(Arranged by Power Range)

Sensors by Power

Sensor Key


Posted Comments:
user  (posted 2020-10-09 03:16:34.947)
Hello, can you please provide the information how to use this power meter with Raspberry pi?
wskopalik  (posted 2020-10-13 05:37:28.0)
Thank you very much for your inquiry. A Raspberry Pi usually works with a Linux-based operating system. We can provide drivers for Ubuntu for the optical power meters which might be compatible with the Raspberry Pi operating system as well. Alternatively, you can e.g. use PM101 or PM101R which have an RS232 interface which is available on the Raspberry Pi as well. So you could communicate with the power meter directly on this interface and would not need any additional drivers. I have contacted you directly to discuss these options in more detail.
X Sun  (posted 2020-07-08 12:33:29.57)
I have downloaded the the power meter utility 2.2. run the software my PM100USB doesn't appear in the device list window, rescan or unplug/plug didn't work. Though the PM100USB showed in windows Device manger with no error.
MKiess  (posted 2020-07-09 05:27:04.0)
This is an response from Michael of Thorlabs. Thank you very much for your inquiry. The Thorlabs Optical Power Monitor (OPM) uses the newer power meter driver TLPM.dll instead of the formerly used NI-VISA™-based driver PM100D.dll. Although both drivers are included in the download, the new TLPM.dll driver is automatically installed with the OPM software. The driver can be changed with the tool, Driver Switcher. So if you are using the OPM software, make sure that the TLPM.dll drivers used. I have contacted you directly to discuss further details.
Ekin Kocabas  (posted 2020-06-18 10:55:17.2)
This is in response to the question by "Moritz Jung (posted 2020-05-28 09:26:52.493)" I found the following functions in TLPM drivers useful for sending SCPI commands to the power meter (though I ended up not using this feature much). As MKiess mentioned, a call to TLPM_init is needed to initialize the connection first. TLPM_writeRaw TLPM_readRaw
MKiess  (posted 2020-06-19 09:23:48.0)
This is a response from Michael at Thorlabs. Thank you very much for this feedback and for completing this information.
Moritz Jung  (posted 2020-05-28 09:26:52.493)
Hello, I have a similar question as asked before in these comments: According to the manual, the new TLPM.dll driver can be used togehter with SCPI commands, "as long as the user establishes an USBTMC protocol". Can you give any details on how this is supposed to be done? Is it possible to use the OPM software without changing the driver? When I switch to the old PM100D driver, the device can be accessed via NI-VISA. But I would prefer sticking to the up to date drivers. Thanks for your answer!
MKiess  (posted 2020-06-05 05:21:47.0)
This is a response from Michael at Thorlabs. Thank you very much for your inquiry. You can use the OPM software with the TLPM drivers as well as communicate with the TLPM drivers via SCPI commands. When installing the OPM software, the TLPM drivers are installed by default and are used when the software is started. When communicating via SCPI commands and using the TLPM driver, the device must be initialized with the TLPM functions, i.e. with the function "TLPM_init". Afterwards the driver functions can be used together with the SCPI commands for communication.
Ekin Kocabas  (posted 2019-10-18 18:37:25.303)
I use a S154C detector connected to PM101 and I observe the AO1 fast analog output of the power meter via an oscilloscope as I apply a square current pulse to a laser diode. With another detector/power meter combination I can see ~1 microsecond rise-time (detector limited), however, S154C + PM101 combination results in 28 ms (bandwidth high) or 38 ms (bandwith low setting) rise times. This is very different than the 100 KHz bandwidth in the PM101 specs. What is a typical rise-time that I should expect from S154C? Are there other detectors compatible with PM101 which would lead to faster rise times? If there is a special setting that I need to apply to observe KHz level signals could you let me know? Thank you.
dpossin  (posted 2019-10-25 06:22:33.0)
Dear Ekin, Thank you for your feedback. As the bandwith of our powermeter are limited to a maximum value of 100kHz, we can not provide a rise time of 1µs. The behaviour you are observing is due to a firmware bug which always kept the bandwith on low status. We corrected this issue with the last firmware update which we will provide on our website ASAP. I reached out to you in order to provide further assistance.
Sajjad Haidar  (posted 2019-10-03 11:02:33.577)
Hello I have been using PM101 interface with a thermal sensor. I was wondering, do you have any Python support files for PM101? Thanks
MKiess  (posted 2019-10-10 06:02:20.0)
This is a response from Michael at Thorlabs. Thank you very much for your inquiry. I contacted you directly to send you the necessary information to control the PM101 in Phython.
Ekin Kocabas  (posted 2019-08-26 18:20:09.663)
I had two questions on PM100USB power meters. [Q1] The latest version of the manual (ver 1.4, date 9 Aug 2019) states in Sec 7.1 that "the user can use the SCPI commands with the new TLPM.dll driver, as long as the user establishes an USBTMC protocol." Can you provide details on establishing a USBTMC connection to PM100USB, what additional piece of software do I need? [Q2] The new PM101x Write Your Own Application manual (Version: 1.0 Date: 12-Aug-2019) provides three tables that summarize status registers in Sec 3.4 for PM101 series power meters. Can you provide a similar set of tables for PM100USB? Thank you.
MKiess  (posted 2019-08-29 08:34:23.0)
This is a response from Michael at Thorlabs. Thank you very much for your inquiry. For USBTMC a VISA installation is necessary. NI-VISA is the most widely used, but other implementations like TekVISA are also possible. I contacted you directly to provide further support and to send you the desired status register for the PM100USB.
hartwig s  (posted 2019-07-09 08:09:16.16)
Be advised when measuring DLP projectors with the PM100-USB: The auto-adjust function for the measurement range in the software specifically cannot handle DLP projectors (running ramp protocols). In general, it is better to manually set the measurement range beforehand.
MKiess  (posted 2019-07-12 09:08:08.0)
This is a response from Michael at Thorlabs. Thank you very much for the feedback. Depending on the wavelength of the measured light and the sensor used, it is essential to set the wavelength in the Optical Power Monitor software to compensate the measurement result for the wavelength-dependent sensitivity of the sensor. Therefore, when measuring DLP projectors, it is a good solution to adjust the settings manually. In general, it is recommended to use the default Auto Range ON setting. Auto Range OFF allows you to set the measurement range manually, which is recommended for measuring pulsed light sources, for example.
anish.goel  (posted 2019-03-04 13:19:21.693)
Hi, I am interfacing the TLPM in C# but unable to find any documentation regarding the functions (specifically "return values from functions" for example int setwavelength: What will it return. What will it mean) Where do I find proper documentation for the SDK ?
swick  (posted 2019-03-08 03:23:38.0)
This is a response from Sebastian at Thorlabs. Thank you for the inquiry. After installing the software package you can find documentation about the functions at path: C:\Program Files (x86)\IVI Foundation\VISA\WinNT\TLPM\Manual
kocabass  (posted 2019-02-19 16:45:38.96)
Hello, When I use the TLPM library drivers wrapped in python via ctypes, I see that I get different measurement results if I issue a 1 sec wait time between TLPM_setWavelength and TLPM_measPower vs the case when there is no wait time. It seems like the TLPM_setWavelength function call takes some time to finalize but it returns back to the enclosing program before then. I tried to look into various device registers to determine when setWavelength operation ends but could not find the right register location for that. I'd appreciate any comments on how I can make sure that the TLPM_setWavelength calls have done what they are supposed to do, without having to issue wait commands in between wavelength change and measure commands.
nreusch  (posted 2019-02-26 06:42:59.0)
This is a response from Nicola at Thorlabs. Thank you very much for the inquiry. You could probably add a loop to your program using the TLPM_getWavelength command to check whether set and get wavelength match before the program actually performs a measurement. I will contact you directly for further assistance.
ericshaner8d  (posted 2018-12-26 09:24:11.07)
The description under 'software' for the PM100USB says 'visual basic' examples are included with the driver. They are not, just C and C# are included.
nreusch  (posted 2019-01-03 07:26:25.0)
This is a response from Nicola at Thorlabs. Thank you for the note. You are right about the fact that Visual Basic examples are not installed with software and drivers. We will correct the statement on our website.
segreto  (posted 2018-11-05 10:01:26.68)
I have developed my own driver to read data at high speed from the PM100USB and found that the performance of this device is severely limited by the lack of the SCPI command "DATA:FORMAT {FLOAT, ASCII}" that would allow the user to choose to transfer data directly in binary format, thus saving the time required for the (in most of the cases totally useless) binary to ASCII conversion. Do you plan to implement this command in the near future?
swick  (posted 2018-11-21 03:27:17.0)
This is a response from Sebastian at Thorlabs. Thank you for sharing your findings with us. We will look into this. At the time we do not plan to change the SCPI command set.
juozas  (posted 2018-10-24 13:02:44.853)
Hello, We're writing custom software that we need to work on multiple operating systems, including Linux and macOS. Are there still no drivers or other tools that would enable development for those operating systems? If writing our own drivers is the only option, where could we get complete documentation? Thank you!
swick  (posted 2018-11-21 04:20:12.0)
This is a response from Sebastian at Thorlabs. Thank you for the inquiry. For Linux we can provide shared objects but for macOS we do not provide drivers at the moment. I contacted you directly to get further information about the operating systems you work with.
ebull  (posted 2018-08-20 11:08:37.53)
We use PM100USB and PM100D frequently for measurements with Thorlabs sensors and for measurements with our own photodiodes - the ability to use a custom sensor is very useful to us. We often do not need the screen of the PM100D, but we generally want the analog output that the PM100USB lacks. A PM100USB with analog output would be the perfect device for many of our uses. Elias
nreusch  (posted 2018-08-23 05:45:12.0)
This is a response from Nicola at Thorlabs. Thank you for your suggestion. We are already working on the realization of such a device. I will contact you directly with further information.
stefano.valle  (posted 2018-07-31 15:51:34.8)
It would be really useful to have a library for Matlab, or at least a set of command line to be able to control to set the power meter and retrieve the data required, without passing through Labview or C++
swick  (posted 2018-08-08 04:36:30.0)
This is a response from Sebastian at Thorlabs. Thank you for the feedback. After establishing the USB connection SCPI commands could be used for remote control. I contacted you directly to provide a list of these commands.
jim.mcginnis  (posted 2018-06-06 07:57:31.237)
Sent email to tech support regarding the issues below.
jim.mcginnis  (posted 2018-06-05 15:44:28.107)
Followup: Windows version is Windows 10, 1803 Creators Spring Update. Reinstalled all drivers from Thorlabs. Thanks
jim.mcginnis  (posted 2018-06-05 15:37:13.973)
We have constructed both 32bit and 64bit applications for reading an optical sensor connected to the PM100USB. The applications work correctly on Windows 7. Building 64 bit C# application that combines the Kinesis 64 bit motion control libraries with the TLPM 64 bit libraries in a single application. Works as expected on Windows 7 Problem arises when building and running on Windows 10. The TLPM calls to get resources returns more than just the PM100USB devices. Selecting the correct device returned by the get resource call and trying to configure the device results in exception thrown by the TLPM call. This does not happen on the Windows 7 platform. Only Windows 10. Is this a known problem for the 64 bit TLPM libraries?? We have no issues with the Kinesis 64 bit libraries on Windows 10 or 7. Suggestions???
jacyjacythomson  (posted 2017-04-24 16:15:16.97)
Hi I am trying to develop a small program in LabVIEW like the PM100D Simple Example. I need the Commands to send to the instrument. These are similar to : SENS:AVER There should be a Programming Command Manual or a link on your website. Thank you, Jeff
swick  (posted 2017-04-26 04:52:50.0)
This is a response from Sebastian at Thorlabs. Thank you for the inquiry. An overview of SCPI commands for our Power Meter Consoles can be found in the manual at chapter "SCPI Commands". I will contact you directly for further assistance.
asmirnov  (posted 2017-02-02 01:10:38.227)
We use a number PM100USB interfaces. If two PM100USB connected simultaneously, some of them (about 15% of all) can hang up. It doesn`t depend on NI-VISA RTE/driver/firmware version, MotherBoard model etc. Is it a fabric or software defect?
swick  (posted 2017-02-03 05:41:03.0)
This is a response from Sebastian at Thorlabs. Thank you for the feedback. Using more than one PM100USB simultaneously at one operating system should work without problems. The Power Meter Consoles are based on SCPI commands, which avoids driver conflicts in the operating system. A known issue which avoids using multiple devices at the same time could be USB-Hubs, bad quality USB cables and/or a slow PC. I will contact you directly for assistance and troubleshooting.
ddeng  (posted 2017-01-31 19:34:13.383)
Could you support this PM100USB under Windows 10? I have one unit.
wskopalik  (posted 2017-02-01 03:22:18.0)
This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry. You can use the software provided on the website to operate the PM100USB. Supported operating systems are Windows® XP (32 bit) SP3 or Windows® Vista, 7, 8.1, or 10 (32 bit, 64 bit). I will contact you directly to provide further assistance.
ester0904bond  (posted 2016-03-28 09:22:41.837)
Can this modal do data sampling up to 100kHz? if can, can we do that in labview? thank you
besembeson  (posted 2016-03-28 09:49:18.0)
Response from Bweh at Thorlabs USA: This may not be possible, even with a photodiode sensor though we have a 16 bit AD converter in the PM100USB. Speed loss could come from the queries of commands which always checks the availability/status of the sensor. You could write your own routines which allows for faster sampling rates but the USB 2.0 port will limit this and the PM100USB has no analog output to bypass this. You may consider instead the PM100D, PM100A or the PM200.
roger_york  (posted 2016-03-11 19:01:25.26)
Is there anyway to interface the PM100USB with a MacBook Air?
shallwig  (posted 2016-03-14 11:53:36.0)
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. At the moment we have unfortunately no drivers available to run our power meter software with Apple OS.
nherrick  (posted 2015-10-22 16:40:57.477)
What do you think are the chances of being able to use the PM100USB with a raspberry pi?
tschalk  (posted 2015-10-23 07:11:50.0)
This is a response from Wolfgang at Thorlabs. Thank you for your inquiry. A Raspberry Pi usually works with a Linux-based operating system for which we unfortunately can't offer full support. There is however some information about the use of our powermeters in Linux and I will contact you directly about it.
johnhobbs  (posted 2015-09-30 13:34:26.513)
Please fix your labview drivers for the PM100USB! I just upgraded to Labview 2015 and your labview drivers now hang up. I can send my labview driver if you want for the PM100USB. bottom line you cannot ini the PM100USB read the power and then close the device multiple times without it hanging up. I think your drives are not properly closing the resources for the device. best, John Hobbs
shallwig  (posted 2015-10-01 09:55:41.0)
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. We checked the drivers with Labview 2015 and could not reproduce this problem. I will contact you directly to troubleshoot this in more detail.
bo.jing  (posted 2015-05-26 17:42:20.707)
The inner plastic (grey) USB connector on the PCB board inside the device detached itself at the soldering points. Can I send this unit back for repairs? We are quite disappointed at this obvious point of failure.
shallwig  (posted 2015-05-27 06:33:02.0)
This is a response from Stefan at Thorlabs. Thank you very much for contacting us in this matter. We are really sorry for the inconveniences you had through this. I will contact you directly to handle the repair/exchange as soon as possible.
a.andreski  (posted 2015-05-12 17:41:44.017)
Is there a way to read out a time-series of datapoints (lets say 1M samples) using your C-series photodioide sensors with a PM100USB but with a specific sampling rate?
tschalk  (posted 2015-05-13 07:02:08.0)
This is a response from Thomas at Thorlabs. Thank you very much for your feedback. The maximum achievable sampling rate is about 300Hz. The GUI provides a function called fast logging which enables the maximum logging frequency of the unit. If you want to sample a signal in the MHz range you could use one of our amplified photodetectors in combination with a scope. I will contact you directly to discuss your application.
catox  (posted 2014-07-23 15:14:35.38)
It would be great if you could offer a similar product with Serial via USB interface to remove the requirement for NI-VISA installation.
shallwig  (posted 2014-07-23 09:52:01.0)
This is a response from Stefan at Thorlabs. Thank you very much for your feedback. At the moment it is not planned to offer the PM100USB in such a configuration. But the PM160 http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=7233&pn=PM160#7267 allows you to communicate with your PC without using VISA as it can additionally to USB also transmit data by Bluetooth. I will contact you directly to discuss your application in detail.
bagresci  (posted 2014-04-17 17:10:32.223)
I found a method to communicate with pm100usb. I and using Agilient USBTMC kernel driver with Scientific linux 6.4. (http://www.home.agilent.com/upload/cmc_upload/All/usbtmc.html?&cc=KR&lc=kor). Below is my shell script : ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear echo INIT > /dev/usbtmc1 while((i<100)) do ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear echo READ? > /dev/usbtmc1 cat /dev/usbtmc1 ((i=i+1)) done ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear echo ABOR > /dev/usbtmc1 ./usbtmc_ioctl 1 reset ./usbtmc_ioctl 1 clear
shallwig  (posted 2014-04-17 08:49:33.0)
This is a response from Stefan at Thorlabs. Thank you very much for your feedback and sharing this helpful information with us. I will contact you directly to discuss any open questions you have in this matter.
hadmack  (posted 2013-07-08 17:48:23.577)
Could you please provide an update on the compatibility of PM100USB with the Linux USBTMC driver?
tschalk  (posted 2013-07-10 08:40:00.0)
This is a Response from Thomas at Thorlabs. Thank you very much for your inquiry. To control the device with Linux you would need a USBTMC-driver for Linux and the instrument-driver-code for the corresponding SCPI commands to communicate via the USBTMC driver. The low level specifications are the followings: - Universal Serial Bus Test and Measurement Class Specification (USBTMC) Revision 1.0. USB Implementers Forum. April 14, 2003 - and - Universal Serial Bus Test and Measurement Class, Subclass USB488 Specification (USBTMC-USB488) Revision 1.0. April 14, 2003 - and the command structures are - IEEE Std 488.2-1992; IEEE Standard Codes, Formats, Protocols, and Common Commands For Use With IEEE Std 488.1-1987, IEE Standard Digital Interface for Programmable Instrumentation - and the used command format is - Standard Commands For Programmable Instruments (SCPI) -. You can use the source code of our instrument driver which is an open source code under LGPL. This one can be changed so that it is possible to use the Linux - USBTMC communication instead of the NI functions. I will contact you directly for more detailed information.
jvigroux  (posted 2012-06-20 09:54:00.0)
A response from Julien at Thorlabs: Thank you for your feedback! The communication of the PM100USB is based on the USBTMC protocol. We rely on the VISA engine to create a stable overlayer on the USBTMC but if one does not want to use the VISA engine, it is of course possible to address the USB port directly at a USBTMC level. I will contact you to discuss further the possible approaches for the driver implementation you plan.
gnishi  (posted 2012-06-19 20:45:33.0)
It would be great to provide the Linux driver or low level USB specification to write the driver. We don't need NI plat form, which consumes huge resources (incl. cost.), to drive this powermeter.
jjurado  (posted 2011-04-06 16:35:00.0)
Response from Javier at Thorlabs to last poster: Thank you very much for your feedback. I will share your comments with our design engineers for the PM100USB. Please check back with us at techsupport@thorlabs.com if you would like to check on the status of this project.
user  (posted 2011-04-06 18:40:07.0)
It would be great to have a product like this compatible with Android, and be able to use on a tablet or smartphone.
jjurado  (posted 2011-02-14 18:14:00.0)
Response from Javier at Thorlabs to huw.major: Thank you for submitting your inquiry. The crashing is most likely due to an older firmware version of the PM100USB power meter. You can upgrade to version 1.3 by installing the Device Firmware Upgrade wizard and following the instructions. You can download the firmware application via the following link: http://www.thorlabs.com/software_pages/ViewSoftwarePage.cfm?Code=PM100x I will follow up with you directly.
huw.major  (posted 2011-02-14 11:37:25.0)
Hi, I have 3 of these products and am trying to use them for prolonged testing purposes, > 1000Hrs constant use. I find them very easy to set up and use, but I have found that they constantly crash. I am using a Labview 2009 program, based on your supplied Labview example code, which seems to work fine most of the time. However, I am getting sporadic crashed of 1 or more power meters which require a power down to fix. The code is running under Windows 7, do you know of any issues with this combination?
huw.major  (posted 2011-02-14 11:32:47.0)
Hi I have 3 of these products and am trying to use them for prolonged testing purposes, >1000Hrs constant use. I find them very easy to set up and use, but, I have found that they constantly crash. I am using a Labview 2009 program based on your supplied Labview code which seems to work fine most of the time. However, I am getting sporadic crashes of 1 or more power meters which require a power down to fix. The code is running under Windows 7, do you know of any problems with this combination?
julien  (posted 2011-01-28 11:41:52.0)
a response from Julien at Thorlabs: Thank you for your feedback. Several PM100USBs can be connected to the same hub. We actually provide a small utility software that allows to readout up to 8 PM100USB simultaneously. This utility can be downloaded from the software page of the PM100USB. Concerning the Iphone compatibility, the PM100USB software is entirely NI VISA based, which is as of now unfortunately not compatible with Iphones yet.
mobrien  (posted 2011-01-27 12:46:16.0)
I was wondering if you have given any thought to making a PM100USB App for the iPhone etc. Our company currently does not provide smartphones or tablets to its employees but you can kind of see where things are heading... On a related topic, we have one of these, could I connect multiple PM100USBs to a single USB port via a USB hub? Mike

Thorlabs offers a wide selection of power and energy meter consoles and interfaces for operating our power and energy sensors. Key specifications of all of our power meter consoles and interfaces are presented below to help you decide which device is best for your application. We also offer self-contained wireless power meters and compact USB power meters.

When used with our C-series sensors, Thorlabs' power meter consoles and interfaces recognize the type of connected sensor and measure the current or voltage as appropriate. Our C-series sensors have responsivity calibration data stored in their connectors. The console will read out the responsivity value for the user-entered wavelength and calculate a power or energy reading.

  • Photodiode sensors deliver a current that depends on the input optical power and the wavelength. The current is fed into a transimpedance amplifier, which outputs a voltage proportional to the input current. The photodiode's responsivity is wavelength dependent, so the correct wavelength must be entered into the console for an accurate power reading. The console reads out the responsivity for this wavelength from the connected sensor and calculates the optical power from the measured photocurrent.
  • Thermal sensors deliver a voltage proportional to the input optical power. Based on the measured sensor output voltage and the sensor's responsivity, the console will calculate the incident optical power.
  • Energy sensors are based on the pyroelectric effect. They deliver a voltage peak proportional to the pulse energy. If an energy sensor is recognized, the console will use a peak voltage detector and the pulse energy will be calculated from the sensor's responsivity.

The consoles and interfaces are also capable of providing a readout of the current or voltage delivered by the sensor. Select models also feature an analog output.

Consoles

Item # PM100A PM100D PM400 PM320E
(Click Photo to Enlarge) PM100A PM100D PM400 PM320E
Key Features Analog Power Measurements Digital Power and Energy Measurements Digital Power and Energy Measurements, Touchscreen Control Dual Channel
Compatible Sensors Photodiode and Thermal Power Photodiode and Thermal Power; Pyroelectric
Housing Dimensions
(H x W x D)		 7.24" x 4.29" x 1.61"
(184 mm x 109 mm x 41 mm)		 7.09" x 4.13" x 1.50"
(180 mm x 105 mm x 38 mm)		 5.35" x 3.78" x 1.16"
(136.0 mm x 96.0 mm x 29.5 mm)		 4.8" x 8.7" x 12.8"
(122 mm x 220 mm x 325 mm)
Channels 1 2
External Temperature Sensor Input (Sensor not Included) - - Instantaneous Readout and Record Temperature Over Time -
External Humidity Sensor Input (Sensor not Included) - - Instantaneous Readout and Record Humidity Over Time -
GPIO Ports - 4, Programmable -
Source Spectral Correction - - Yes! -
Attenuation Correction - - Yes! -
External Trigger Input - - - yes
Display
Type Mechanical Needle and LCD Display with Digital Readout 320 x 240 Pixel Backlit Graphical LCD Display Protected Capacitive Touchscreen with Color Display 240 x 128 Pixels
Graphical LCD Display
Dimensions Digital: 1.9" x 0.5"
(48.2 mm x 13.2 mm)
Analog: 3.54" x 1.65"
(90.0 mm x 42.0 mm)		 3.17" x 2.36"
(81.4 mm x 61.0 mm)		 3.7" x 2.1"
(95 mm x 54 mm)		 3.7" x 2.4"
(94.0 mm x 61.0 mm)
Refresh Rate 20 Hz 10 Hz (Numerical)
25 Hz (Analog Simulation)		 20 Hz
Measurement Viewsa
Numerical yes yes yes
Mechanical Analog Needle yes - - -
Simulated Analog Needle - yes Yes! yes
Bar Graph - yes Yes! yes
Trend Graph - yes Yes! Yes!
Histogram - yes - Yes!
Statistics Yes! yes Yes! yes
Memory
Type - SD Card NAND Flash -
Size - 2 GB 4 GB -
Power
Battery LiPo 3.7 V 1300 mAh LiPo 3.7 V 2600 mAh -
External 5 VDC via USB or Included AC Adapter 5 VDC via USB Selectable Line Voltage: 100 V, 115 V, 230 V (±10%)
  • These are the measurement views built into the unit. All of our power meter consoles except the PM320E can be controlled using the Optical Power Monitor software package. The PM320E has its own software package.

Interfaces

Item # PM101 PM102 PM103 PM101A PM102A PM103A PM101R PM101U PM102U PM103U PM100USB
(Click Photo to Enlarge) PM101 PM102 PM103 PM101A PM102A PM103A PM101R PM101U PM102U PM103U PM100USB
Operation Protocol USB, RS232, UART,
and Analog		 USB and Analog SMA USB and
RS232		 USB Operation USB
Sensor Compatibility
Photodiode - - -
Thermal Power - - -
Thermal Position & Power - - - - - - - -
Pyroelectric - - - - - - -
Key Features
C-Series Sensor
DE-9 Connector
USB Connector Lockable Lockable Lockable Lockable Not Lockable
Serial DE-9 Connector - - - -
SMA Connector(s) - 1 Analog Power Output 3 Ports: Power, X-Position, and Y-Position 3 Ports: AO1, AO2, and
Digital I/O (Configurable as External Trigger Input)		 - - -
DA-15 Universal Connector with
2 Auxiliary I/O Ports		 GPIO Ports Also Configurable as Trigger Input (Pin 2) or for Pass/Fail Analysis (Pin 3) - - - -
External Temperature
Sensor Input
(Sensor Not Included)		 NTC Thermistor - - - -
Display
Type No Built-In Display; Controlled via GUI for PC
Refresh Ratea Up to 1000 Hz Up to 1000 Hz Up to 1000 Hz Up to 1000 Hz Up to 300 Hz
Measurement Viewsb
Numerical Requires PC
Simulated Analog Needle Requires PC
Bar Graph Requires PC
Trend Graph Requires PC
Histogram Requires PC
Statistics Requires PC
Memory
Type Internal Non-Volatile Memory
for All Settings		 Internal Non-Volatile Memory
for All Settings		 Internal Non-Volatile Memory for All Settings Internal Non-Volatile Memory
for All Settings		 -
Power
External 5 VDC via USB or
5 to 36 VDC via DA-15 Pins 1 and 9		 5 VDC via USB 5 VDC via USB 5 VDC via USB 5 VDC via USB
  • Dependent on PC Settings
  • These power meter interfaces do not have a built-in monitor, so all data must be displayed through a PC running the Optical Power Monitor Software.

Power Meter Interfaces for Photodiode and Thermal Power Sensors

Power Meter Interface Quick Comparisona
Item # PM101 PM101A PM101R PM101U
Photo (Click to Enlarge)
Connectors Mini USB &
DA-15		 Mini USB &
SMA		 Mini USB &
DE-9		 Mini USB
Control / Digital Output USB 2.0, RS232, or UART USB 2.0 USB 2.0 or RS232 USB 2.0
Analog Output Yes Yes No No
  • See the Feature Comparison tab for a full comparison.
  • Compatible with Over 25 Photodiode and Thermal Power Sensors
  • All Models Feature USB 2.0 Operation
  • Select Models with:
    • UART or RS232 Operation
    • Analog Output
  • Power Supply via USB (All Models) or DA-15 Connector (PM101 Only)
  • Includes Certificate of Calibration

The PM101 Series Interfaces are compatible with all our C-Series photodiode and thermal power sensors. Our standard photodiode, slim photodiode, integrating sphere, and fiber sensors can collectively measure optical powers from 100 pW to 20 W. Our thermal power sensors measure optical powers from 10 µW to 200 W. Alternatively, unamplified anode- or cathode-grounded photodiodes with up to 5 mA photocurrent and thermal elements with a maximum output voltage of 1 V can be used. While all of the interfaces can be operated and powered with a PC via the mini-USB port, select interfaces have additional features such as UART or RS232 operation and analog output (see the table to the right). Models with analog output can be operated autonomously when connected to a power supply, without the need for an additional control device. All of the interfaces include reset buttons, allowing the systems to be easily rebooted.

The non-volatile memory in each interface retains the user's wavelength setting, sensitivity range, and output configuration upon shutting down or rebooting the unit, suitable for repeat measurements over a long period of time. A fast readout rate of 1000 samples per second allows active signal monitoring while the interface is in use. For precise measurements with thermal power sensors, these interfaces use nine voltage measurement ranges from 2 mV to 1 V, compared to only four ranges used by the PM100USB (see the Specs tab).

Please note that sensors are not included with these power meter interfaces. For information about our compatible sensors, please see the sensor descriptions below. Thorlabs offers a recalibration service for these interfaces, which can be ordered below (see Item # CAL-PM1). Alternatively, if you have a corresponding sensor that requires recalibration, you can include the power meter interface with the sensor for recalibration at no additional cost. Also, we offer the USB-ABL-60 cable as a replacement for the USB cable included with each sensor; this cable includes a locking screw to prevent accidental disconnects.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PM101 Support Documentation
PM101Customer Inspired! Power Meter Interface with USB, RS232, UART, and Analog Operation
$484.10
Today
PM101A Support Documentation
PM101APower Meter Interface with USB and Analog Operation
$473.80
Today
PM101R Support Documentation
PM101RPower Meter Interface with USB and RS232 Operation
$473.80
Today
PM101U Support Documentation
PM101UPower Meter Interface with USB Operation
$453.20
5-8 Days

Power Meter Interfaces for Thermal Power and Thermal Position Sensors

Power Meter Interface Quick Comparisona
Item # PM102 PM102A PM102U
Photo
(Click to Enlarge)
Connectors Mini USB &
DA-15		 Mini USB &
SMA		 Mini USB
Control /
Digital Output		 USB 2.0,
RS232, or
UART		 USB 2.0 USB 2.0
Analog Output Yes Yes No
  • See the Feature Comparison tab for a full comparison.
  • Compatible with Over 10 Thermal Power and Thermal Position & Power Sensors
  • All Models Feature USB 2.0 Operation
  • Select Models with:
    • UART or RS232 Operation
    • Analog Output
  • Power Supply via USB (All Models) or DA-15 Connector (PM102 Only)
  • Includes Certificate of Calibration

The PM102 Series Interfaces are compatible with all our C-Series thermal power and thermal position & power sensors. Our thermal power sensors measure optical powers from 10 µW to 200 W. Our thermal position & power sensors can concurrently measure beam position and optical powers from 0.5 mW to 50 W. Alternatively, thermal elements with a maximum output voltage of 1 V can be used. While all of the interfaces can be operated and powered with a PC via the mini-USB port, select interfaces have additional features such as UART or RS232 operation and analog output (see the table to the right). Models with analog output can be operated autonomously when connected to a power supply, without the need for an additional control device. All of the interfaces include reset buttons, allowing the systems to be easily rebooted.

The non-volatile memory in each interface retains the user's wavelength setting, sensitivity range, and output configuration upon shutting down or rebooting the unit, suitable for repeat measurements over a long period of time. A fast readout rate of 1000 samples per second allows active signal monitoring while the interface is in use. For precise measurements with thermal power sensors, these interfaces use nine voltage measurement ranges from 2 mV to 1 V, compared to only four ranges used by the PM100USB (see the Specs tab).

Please note that sensors are not included with these power meter interfaces. For information about our compatible sensors, please see the sensor descriptions below. Thorlabs offers a recalibration service for these interfaces, which can be ordered below (see Item # CAL-PM1). Alternatively, if you have a corresponding sensor that requires recalibration, you can include the power meter interface with the sensor for recalibration at no additional cost. Also, we offer the USB-ABL-60 cable as a replacement for the USB cable included with each sensor; this cable includes a locking screw to prevent accidental disconnects.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PM102 Support Documentation
PM102Thermal Sensor Interface with USB, RS232, UART, and Analog Operation
$484.00
Today
PM102A Support Documentation
PM102AThermal Sensor Interface with USB and Analog Operation
$474.00
5-8 Days
PM102U Support Documentation
PM102UThermal Sensor Interface with USB Operation
$453.00
5-8 Days

Power and Energy Meter Interfaces for Photodiode Power and Pyroelectric Energy Sensors

Power Meter Interface Quick Comparisona
Item # PM103 PM103A PM103U
Photo
(Click to Enlarge)
Connectors Mini USB &
DA-15		 Mini USB &
SMA		 Mini USB
Control /
Digital Output		 USB 2.0,
RS232, or
UART		 USB 2.0 USB 2.0
Analog Output Yes Yes No
  • See the Feature Comparison tab for a full comparison.
  • Compatible with Over 20 Photodiode Power and Pyroelectric Energy Sensors
  • All Models Feature USB 2.0 Operation
  • Select Models with:
    • UART or RS232 Operation
    • Analog Output
  • Power Supply via USB (All Models) or DA-15 Connector (PM103 Only)
  • Includes Certificate of Calibration

The PM103 Series Interfaces are compatible with all our C-Series photodiode power and pyroelectric energy sensors. Our standard photodiode, slim photodiode, integrating sphere, and fiber sensors can collectively measure optical powers from 100 pW to 20 W. Alternatively, unamplified anode- or cathode-grounded photodiodes with currents up to 10 mA can be used. Our pyroelectric energy sensors can measure energies from 10 µJ to 15 J. Other energy sensors with voltage outputs from 20 mV to 200 V can also be used. While all of the interfaces can be operated and powered with a PC via the mini-USB port, select interfaces have additional features such as UART or RS232 operation and analog output (see the table to the right). Models with analog output can be operated autonomously when connected to a power supply, without the need for an additional control device. All of the interfaces include reset buttons, allowing the systems to be easily rebooted.

The non-volatile memory in each interface retains the user's wavelength setting, sensitivity range, and output configuration upon shutting down or rebooting the unit, suitable for repeat measurements over a long period of time. A fast readout rate of 100 kilosamples per second allows active signal monitoring while the interface is in use. For precise measurements, these interfaces use thirteen voltage measurement ranges from 20 mV to 200 V and 21 current measurement ranges from 2 nA to 10 mA, compared to only four voltage and six current ranges used by the PM100USB (see the Specs tab).

The PM103 has two configurable general purpose digital ports, DIO1 (DA-15 Pin 2) and DIO2 (DA-15 Pin 3). Similarly, the PM103A has one auxiliary digital port, DIO1, with an SMA connector. The DIO1 ports can be configured as trigger input or output when reading the data in the 100 kS/s mode. DIO2 can also be configured as a pass/fail flag and queried per remote control command.

Please note that sensors are not included with these power meter interfaces. For information about our compatible sensors, please see the sensor descriptions below. Thorlabs offers a recalibration service for these interfaces, which can be ordered below (see Item # CAL-PM1). Alternatively, if you have a corresponding sensor that requires recalibration, you can include the power meter interface with the sensor for recalibration at no additional cost. Also, we offer the USB-ABL-60 cable as a replacement for the USB cable included with each sensor; this cable includes a locking screw to prevent accidental disconnects.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PM103 Support Documentation
PM103Photodiode Power and Pyroelectric Energy Sensor Interface with USB, RS232, UART, and Analog Operation
$620.00
Today
PM103A Support Documentation
PM103APhotodiode Power and Pyroelectric Energy Sensor Interface with USB and Analog Operation
$610.00
Lead Time
PM103U Support Documentation
PM103UPhotodiode Power and Pyroelectric Energy Sensor Interface with USB Operation
$595.00
Lead Time

Power and Energy Meter Interface for Photodiode, Thermal, and Pyroelectric Sensors

USB Power Energy Meter App Clamp
Click for Details
PM100USB Mounted to
Post with ECM225 Clamp
  • Compatible with Over 30 Photodiode, Thermal, and Pyroelectric Sensors
  • Controlled and Powered via USB
  • Includes Certificate of Calibration

The PM100USB Power and Energy Meter Interface is compatible with all our C-Series photodiode, thermal, and pyroelectric sensors. Our C-Type standard photodiode, slim photodiode, integrating sphere, and fiber sensors can collectively measure optical powers from 100 pW to 20 W. Our thermal power sensors measure optical powers from 10 µW to 200 W. Our thermal power sensors measure optical powers from 10 µW to 200 W. Alternatively, unamplified anode- or cathode-grounded photodiodes with up to 5 mA photocurrent and thermal elements with a maximum output voltage of 1 V can be used. Our pyroelectric energy sensors can measure energies from 10 µJ to 15 J, as well as other energy sensors with voltage outputs from 100 mV to 100 V. This interface can be operated and powered by a PC via the mini-USB port. A readout rate of 300 samples per second allows active signal monitoring while the interface is in use.

Please note that sensors are not included with the PM100USB. For information about our compatible sensors, please see the sensor descriptions below. Thorlabs offers a recalibration service for the PM100USB, which can be ordered below (see Item #CAL-PM1). Alternatively, if you have a corresponding sensor that requires recalibration, you can include the PM100USB with the sensor for recalibration at no additional cost.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PM100USB Support Documentation
PM100USBPower and Energy Meter Interface with USB Operation
$453.41
Today

Standard Photodiode Power Sensors

S120C and quick release 30mm Cage System
Click to Enlarge
S120C and CP44F Quick-Release Mount
  • For General Purpose Optical Power Measurements
  • Integrated Viewing Target for Easy Sensor Alignment
  • Ø9.5 mm Sensor Aperture
  • Sensor, Protective Cap, IR Target, and Thread Adapter Included
  • Fiber Adapters Available Separately (See Table Below)
  • See the Full Web Presentation for More Information

These Standard Photodiode Power Sensors are ideal for metering low power coherent and incoherent sources from the UV to the NIR. Each NIST-Traceable, calibrated sensor features an integrated viewing target for easy alignment, enhanced shielding against electromagnetic interference, an over-temperature-alert device, and a large Ø9.5 mm sensor aperture. The sensors are compatible with 30 mm cage systems, Ø1/2" posts, and SM1 (1.035"-40) lens tubes, and are ideal for free-space and fiber-coupled sources.

Thorlabs offers a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-UVPD for UV-extended Si sensors, Item # CAL-PD for Si sensors and Item # CAL-IRPD for Ge sensors).

Item #a S120VC S120C S121C S122Ch
Sensor Image
(Click the Image to Enlarge)

S120VC

S120C

S121C

S122C
Aperture Size Ø9.5 mm
Wavelength Range 200 - 1100 nm 400 - 1100 nm 400 - 1100 nm 700 - 1800 nm
Power Range 50 nW - 50 mW 500 nW - 500 mW 50 nW - 40 mW
Detector Type Si Photodiode (UV Extended) Si Photodiode Ge Photodiode
Linearity ±0.5%
Resolutionb 1 nW 10 nW 2 nW
Measurement Uncertaintyc ±3% (440 - 980 nm)
±5% (280 - 439 nm)
±7% (200 - 279 nm,
981 - 1100 nm)		 ±3% (440 - 980 nm)
±5% (400 - 439 nm)
±7% (981 - 1100 nm)		 ±5%
Responsivityd (Click for Plot)
Raw Data
Raw Data
Raw Data
Raw Data
Coating/Diffuser Reflective ND (OD1.5)e Reflective ND (OD1)f Reflective ND (OD2)g Absorptive ND (Schott NG9)
Head Temperature Measurement NTC Thermistor 4.7 kΩ
Housing Dimensions Ø30.5 mm x 12.7 mm
Cable Length 1.5 m
Post Mountinge,f,g Universal 8-32 / M4 Tap, Post Not Included
Aperture Thread External SM1 (1.035"-40)
Compatible Fiber Adapters S120-FC, S120-APC, S120-SMA, S120-ST, S120-LC, and S120-SC (Not Included)
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
  • For the S120VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
  • For the S120C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG3). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
  • For the S121C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a absorptive ND diffuser (Schott NG9). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
  • Previously, S122C came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S120VC Support Documentation
S120VCStandard Photodiode Power Sensor, UV-Extended Si, 200 - 1100 nm, 50 mW
$450.16
Today
S120C Support Documentation
S120CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
$324.64
Today
S121C Support Documentation
S121CStandard Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$352.78
5-8 Days
S122C Support Documentation
S122CStandard Photodiode Power Sensor, Ge, 700 - 1800 nm, 40 mW
$648.19
5-8 Days

Slim Photodiode Power Sensors


Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
S130C1Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
CP332SM1-Threaded 30 mm Cage Plate, 0.35" Thick, 2 Retaining Rings, 8-32 Tap
TR61Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 6"
ER6-P43Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
CM1-BS013130 mm Cage Cube-Mounted Non-Polarizing Beamsplitter, 400 - 700 nm, 8-32 and M4 Adapters
View Metric Product List
Item #QtyDescription
Metric Product List
S130C1Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
CP33/M2SM1-Threaded 30 mm Cage Plate, 0.35" Thick, 2 Retaining Rings, M4 Tap
TR150/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 150 mm
ER6-P43Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
CM1-BS013130 mm Cage Cube-Mounted Non-Polarizing Beamsplitter, 400 - 700 nm, 8-32 and M4 Adapters
S130C Sensor in a 30 mm Cage

Click for Details
SM1A29 SM1 Thread Adapter
Mounted on a S130C Sensor

Click for Details
View Product List
Item #QtyDescription
Universal Product List
S130C1Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
FB-511Single-Axis FiberBench, L = 51 mm, 5 Positions
FBSM1FiberBench Mount for Slim Photodiode Sensors
HCA3-SM11FiberBench Wall Plate, FiberPort Compatible, Internally SM1-Threaded
PAF-X-5-B1FiberPort, FC/PC & FC/APC, f=4.6 mm, 600 - 1050 nm, Ø1.00 mm Waist
FBR-LPVIS1Rotating Linear Polarizer Module, 500 - 720 nm, Ø2.5 mm CA
S130C Photodiode Sensor Mounted in FiberBench System Using FBSM Mount
  • For Optical Power Measurements in Confined Spaces
  • Very Slim Design: 5 mm Thin on Sensor Side
  • Ø9.5 mm Sensor Aperture
  • Slideable ND Filter Automatically Changes Sensor Power Range
  • Optional SM1A29 Adapter with VIS/IR Target and External SM1 Threading (More Details)
  • Optional FBSM Mount with VIS/IR Target for FiberBench Systems (More Details)
  • See the Full Web Presentation for More Information

These Slim Photodiode Power Sensors are designed to take optical source power measurements in locations where space and accessibility are at a premium. The 5 mm thin sensor end can fit between closely spaced optics, cage systems, and other arrangements where standard power meters may not fit. The NIST-Traceable, calibrated sensors also feature a large Ø9.5 mm sensor aperture and slideable neutral density filter for dual power ranges in one compact device.

A separately available SM1A29 adapter can be attached by 2 setscrews to any S130 series power sensor to mount fiber adapters, light shields, filters or any other SM1-threaded (1.035"-40) mechanics or optics. The FBSM Mount allows our S130 series power sensors to be mounted vertically into FiberBench systems for stable mounting with a minimal footprint.

Thorlabs offers a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-UVPD2 for UV-extended Si sensors, Item #CAL-PD2 for Si sensors, and Item # CAL-IRPD2 for Ge sensors).

Item #a S130VC S130C S132C
Sensor Image
(Click the Image to Enlarge)

S130VC

S130C

S132C
Aperture Size Ø9.5 mm
Wavelength Range 200 - 1100 nm 400 - 1100 nm 700 - 1800 nmb
Power Range
(with Filter)		 500 pW - 0.5 mWc
(Up to 50 mW)c		 500 pW - 5 mW
(Up to 500 mW)		 5 nW - 5 mW
(Up to 500 mW)
Detector Type Si Photodiode (UV Extended) Si Photodiode Ge Photodiode
Linearity ±0.5%
Resolution 100 pWd 1 nWe
Measurement Uncertaintyf ±3% (440 - 980 nm)
±5% (280 - 439 nm)
±7% (200 - 279 nm, 981 - 1100 nm)		 ±3% (440 - 980 nm)
±5% (400 - 439 nm)
±7% (981 - 1100 nm)		 ±5%
Responsivityg (Click for Plot)
Raw Data
Raw Data
Raw Data
Coating/Diffuser Reflective ND (OD1.5)c Reflective ND (OD2)h Absorptive ND (Schott NG9/KG3)b
Housing Dimensions 150 mm x 19 mm x 10 mm; 5 mm Thickness on Sensor Side
Cable Length 1.5 m
Post Mounting 8-32 and M4 Taps
Adapters (Not Included) SM1A29: Add SM1 Thread and Viewing Target to Aperture
Fiber Adapters Compatible with SM1A29 Adapter: S120-FC, S120-APC, S120-SMA, S120-ST, S120-LC, and S120-SC
FBSM: Integrate Sensor into FiberBench Setups
Compatible Consoles PM400, PM100D, PM100USB, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • For the S132C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1), which would decrease the wavelength range from 700 nm to 1800 nm to 1200 nm to 1800 nm. For additional information, please contact technical support.
  • For the S130VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an optical power range of 5 nW to 5 mW (50 nW to 50 mW with filter) and a reflective ND diffuser (OD1). For additional information, please contact technical support.
  • Measured with PM100D console in low bandwidth setting, without filter.
  • Measured with PM100D console in low bandwidth setting at 1550 nm, without filter.
  • Beam Diameter > 1 mm.
  • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
  • For the S130C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG9). For additional information, please contact technical support.
SM1A29 is an adapter that can be attached by 2 set screws to any S130 series power sensor. This gives the possibility to mount fiber adapters, light shields, filters or any other SM1 threaded mechanics or optics.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S130VC Support Documentation
S130VCSlim Photodiode Power Sensor, UV-Extended Si, 200 - 1100 nm, 50 mW
$653.60
5-8 Days
S130C Support Documentation
S130CSlim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$539.98
Lead Time
S132C Support Documentation
S132CSlim Photodiode Power Sensor, Ge, 700 - 1800 nm, 500 mW
$767.23
Lead Time
SM1A29 Support Documentation
SM1A29Customer Inspired! SM1 Thread Adapter for Slim Photodiode Sensors
$44.64
Today
FBSM Support Documentation
FBSMFiberBench Mount for Slim Photodiode Sensors
$44.36
5-8 Days

Compact Slim Photodiode Power Sensor

Item #a S116C
Sensor Image
(Click the Image to Enlarge)

S116C
Aperture Size Ø6 mm
Wavelength Range 400 - 1100 nm
Power Range 20 nW - 50 mW
Detector Type Si Photodiode
Linearity ±0.5%
Resolution 1 nWb
Measurement Uncertaintyc ±3% (451 - 1000 nm)
±5% (400 - 450 nm, 1001 - 1100 nm)
Responsivityd
(Click for Plot)		 Typical Responsivity
Raw Data
Coating/Diffuser Absorptive ND (NG9)
Housing Dimensions
(L x W x T)		 70.0 mm x 11.0 mm x 8.9 mm;
10.0 mm Width and 4.5 mm Thickness on Sensor Side
Active Detector Area 7 mm x 7 mm
Cable Length 1.5 m
Mounting Threads 2 Universal 8-32 / M4 Taps
(One on the Back, One on the Bottom),
Posts Not Included
Adapters
(Not Included)		 SM05A29: Add SM05 Thread to Aperture
Fiber Adapters Compatible with SM05A29 Adapter:
PM20-FC2, PM20-FC, PM20-APC2, PM20-APC,
PM20-SMA, PM20-ST, PM20-SC, and PM20-LC
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Measured with PM100D console in low bandwidth setting.
  • Beam Diameter > 1 mm.
  • The sensor responsivity shown in these plots were calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
SM1A29 is an adapter that can be attached by 2 set screws to any S130 series power sensor. This gives the possibility to mount fiber adapters, light shields, filters or any other SM1 threaded mechanics or optics.
  • For Optical Power Measurements in Tiny Spaces Such as 16 mm Cage Systems
  • Wavelength Range: 400 - 1100 nm
  • Very Slim Design: 10.0 mm Wide and 4.5 mm Thin on Sensor Side
  • Silicon Photodiode with Ø6 mm Sensor Aperture
  • Designed for Power Measurements for Low Power Lasers
  • Post Mountable via 8-32 (M4) Taps
  • SM05A29 Adapter with External SM05 (0.535"-40) Threading Available Separately (More Details)
  • See the Full Web Presentation for More Information

The S116C Compact Slim Photodiode Power Sensor is designed to take optical source power measurements in locations where space and accessibility are at a premium. The 4.5 mm thin photodiode sensor can fit between the rods of a 16 mm cage system, as seen in the application photo below, as well as through the side openings of our slotted Ø1/2" lens tubes (Item #s SM05L20C and SM05L30C). This sensor also features a Ø6 mm sensor aperture.

A separately available SM05A29 adapter can be attached by two 0.05" (1.3 mm) hex setscrews to an S116C power sensor to mount fiber adapters, light shields, filters or any other SM05-threaded (0.535"-40) mechanics or optics. The adapter mounted on the S116C power sensor is shown below.

Each sensor is shipped with NIST- and PTB-traceable calibration data. The included data is determined with the help of a certified reference diode, which corresponds to the spectral range of the sensor to be calibrated. Thorlabs offers a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-PD for Si sensors).


Click to Enlarge
View Imperial Product List
Item #QtyDescription
Imperial Product List
S116C1Compact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
MSH21Swivel-Base Mini-Series Post Holder, 2" (51 mm) Tall, #4 (M3) Slot
MS1R1Mini-Series Optical Post, Ø6 mm, L = 1"
SC6W116 mm Cage Cube
SCP05116 mm Cage System, XY Translating Lens Mount for Ø1/2" Optics
KC05-T1SM05 Threaded Kinematic Cage Mount, Ø1/2" Optics
TR11Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
SR4-P42Compact Cage Assembly Rod, 4" Long, Ø4 mm, 4 Pack
PH1.51Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 1.5"
BA21Mounting Base, 2" x 3" x 3/8"
View Metric Product List
Item #QtyDescription
Metric Product List
S116C1Compact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
MSH21Swivel-Base Mini-Series Post Holder, 2" (51 mm) Tall, #4 (M3) Slot
MS1R/M1Mini-Series Optical Post, Ø6 mm, L = 25 mm
SC6W116 mm Cage Cube
SCP05116 mm Cage System, XY Translating Lens Mount for Ø1/2" Optics
KC05-T/M1SM05 Threaded Kinematic Cage Mount, Ø1/2" Optics, Metric
TR30/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 30 mm
SR4-P42Compact Cage Assembly Rod, 4" Long, Ø4 mm, 4 Pack
PH40/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=40 mm
BA2/M1Mounting Base, 50 mm x 75 mm x 10 mm
S116C Sensor in a 16 mm Cage System

Click for Details
SM05A29 SM05 Thread Adapter
(Sold Separately) Mounted on
an S116C Sensor
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S116C Support Documentation
S116CNEW!Compact Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
$400.00
Today
SM05A29 Support Documentation
SM05A29NEW!SM05-Threaded Adapter for Compact Slim Photodiode Sensors
$42.00
Today

Microscope Slide Photodiode Power Sensor

Item #a S170C
Sensor Image
(Click Image to Enlarge)		 S170C Microscope Slide Power Head
Overall Dimensions 76.0 mm x 25.2 mm x 5.0 mm
(2.99" x 0.99" x 0.20")
Active Detector Area 18 mm x 18 mm
Input Aperture 20 mm x 20 mm
Wavelength Range 350 - 1100 nm
Optical Power Working Range 10 nW - 150 mW
Detector Type Silicon Photodiode
Linearity ±0.5%
Resolutionb 1 nW
Calibration Uncertaintyc ±3% (440 - 980 nm)
±5% (350 - 439 nm)
±7% (981 - 1100 nm)
Responsivityd (Click for Plot) Typical Responsivity
Raw Data
Neutral Density Filter Reflective (OD 1.5)
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Tap, Post Not Included
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
  • Wavelength Range: 350 nm to 1100 nm
  • Sensitive to Optical Powers from 10 nW to 150 mW
  • Designed to Measure Optical Power at the Sample Plane of a Microscope
  • Silicon Photodiode with Large 18 mm x 18 mm Active Area
  • Sensor Housing Dimensions: 76.0 mm x 25.2 x 5.0 mm
  • Index Matching Gel Utilized in Design to Prevent Internal Reflections
  • Information Stored in Connector
    • Sensor Data
    • NIST- and PTB-Traceable Calibration Data
  • Post Mountable via 8-32 (M4) Tap

The S170C Microscope Slide Power Sensor Head is a silicon photodiode sensor designed to measure the power at the sample in microscopy setups. The silicon photodiode can detect wavelengths between 350 nm and 1100 nm at optical powers between 10 nW and 150 mW. The sensor head's 76.0 mm x 25.2 mm footprint matches that of a standard microscope slide and is compatible with most standard upright and inverted microscopes.

The photodiode has an 18 mm x 18 mm active area and is contained in a sealed housing behind a neutral density (ND) filter with OD 1.5. A 20 mm x 20 mm indentation around the surface of the ND filter is sized to accept standard microscope cover slips. An immersion medium (water, glycerol, oil) may be placed in this well directly over the ND filter, or a cover slip may be inserted first to simplify clean up. The gap between the photodiode and the neutral density filter has been filled with an index matching gel in order to prevent internal reflections from causing significant measurement errors when using high NA objectives with oil or water.

The bottom of the sensor housing features a laser-engraved grid to aid in aligning and focusing the beam. In standard microscopes, this grid can be used for beam alignment before flipping the sensor head to face the objective for power measurements. In inverted microscopes, turn on the transmitted illuminator to align the grid on the detector housing with the beam, thereby centering the sensor in front of the objective. Alternatively, the diffusive surface of the ND filter can be used as a focusing plane.

Sensor specifications and the NIST- and PTB-traceable calibration data are stored in non-volatile memory in the sensor connector and can be read out by the latest generation of Thorlabs power meters. We recommend yearly recalibration to ensure accuracy and performance. Calibration may be ordered using the CAL-PD recalibration service available below. Please contact technical support for more information.

Thorlabs also offers a Microscope Slide Sensor Head with a thermal sensor; for complete specifications, the full presentation can be found here.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S170C Support Documentation
S170CCustomer Inspired! Microscope Slide Power Sensor, 350 - 1100 nm, 150 mW
$1,206.56
5-8 Days

Microscope Slide Thermal Power Sensor

Item #a S175C
Sensor Image
(Click Image to Enlarge)		 Microscope Thermal Sensor
Active Detector Area 18 mm x 18 mm
Wavelength Range 0.3 - 10.6 µm
Power Range 100 µW - 2 W
Detector Type Thermal Surface Absorber (Thermopile)
Linearity ±0.5%
Resolutionb 10 µW
Measurement Uncertaintyc ±3% @ 1064 nm;
±5% @ 300 nm - 10.6 µm
Response Time 3 s
(<2 s from 0 to 90%)
Housing Dimensions 76 mm x 25.2 mm x 4.8 mm
(2.99" x 0.99" x 0.19") 
Cable Length 1.5 m
Housing Features Integrated Glass Cover
Engraved Laser Target on Back
Post Mounting N/A
Cage Mounting N/A
Aperture Thread N/A
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Measured with the legacy PM200 Touch Screen Console
  • Beam Diameter: >1 mm

Click to Enlarge
Typical absorption curve for the S175C (glass and absorber). Note that this curve is representative, and the actual absorption across the spectrum will vary from unit to unit.
Microscope Thermal Sensor
Click to Enlarge
The back of the S175C housing is engraved with the sensor specifications and a target for centering the beam on the sensor.
  • Wavelength Range: 300 nm - 10.6 µm
  • Sensitive to Optical Powers from 100 µW to 2 W
  • Designed to Measure Optical Power in the Sample Plane of a Microscope
  • Thermal Sensor with 18 mm x 18 mm Active Area
  • 76.0 mm x 25.2 mm Footprint Matches Standard Microscope Slides
  • Information Stored in Connector
    • Sensor Data
    • NIST- and PTB-Traceable Calibration Data
  • See the Full Web Presentation for More Information

The S175C Microscope Slide Thermal Power Sensor Head is designed to measure the power at the sample in microscopy setups. The thermal sensor can detect wavelengths between 300 nm and 10.6 µm at optical powers between 100 µW and 2 W. The sensor head's 76.0 mm x 25.2 mm footprint matches that of a standard microscope slide and is compatible with most standard upright and inverted microscopes.

The thermal sensor has an 18 mm x 18 mm active area and is contained in a sealed housing behind a glass cover. An immersion medium (water, glycerol, oil) may be placed over the glass cover plate.

As seen in the image to the right, the bottom of the sensor housing features a laser-engraved target to aid in aligning and focusing the beam. In standard microscopes, the target can be used for beam alignment before flipping the sensor head to face the objective for power measurements. In inverted microscopes, turn on the trans-illumination lamp and align the target on the detector housing with the beam; this will center the sensor in front of the objective.

Sensor specifications and the NIST- and PTB-traceable calibration data are stored in non-volatile memory in the sensor connector and can be read out by the latest generation of Thorlabs power meters. We recommend yearly recalibration to ensure accuracy and performance. Calibration may be ordered using the CAL-THPY recalibration service available below. Please contact technical support for more information.

Thorlabs also offers a Microscope Slide Sensor Head with a photodiode sensor for low-power, high-resolution measurements; the full presentation may be found here.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S175C Support Documentation
S175CCustomer Inspired! Microscope Slide Thermal Power Sensor, 300 nm - 10.6 µm, 2 W
$1,206.56
5-8 Days

Integrating Sphere Photodiode Power Sensors

S142C and S140-BFA Bare Fiber Adapter
Click to Enlarge
S142C and S140-BFA Bare Fiber Adapter (Sold Separately)
S142C and S120-FC Fiber Adapter
Click to Enlarge
S142C with the S120-FC Fiber Adapter (Included)
  • For Measurements Independent of Beam Shape and Entrance Angle
  • Integrating Sphere Design Acts as a Diffuser with Minimal Power Loss
  • Ø5 mm, Ø7 mm, or Ø12 mm Input Aperture
  • Removable S120-FC Fiber Adapter (FC/PC and FC/APC) Included
  • Compatible Fiber Adapters for Terminated and Bare Fiber (See Table Below)
  • See the Full Web Presentation for More Information

These Integrating Sphere Photodiode Power Sensors are the ideal choice for power measurements independent of beam uniformity, divergence angle, beam shape, or entrance angle, making them excellent for use with fiber sources and off-axis free space sources.

Our integrating spheres are designed for wavelength ranges from the visible through the NIR. Sensor heads for use between 350 and 2500 nm use a single Ø1" or Ø2" sphere made from Zenith® PTFE and feature a black housing to minimize reflected light around the entrance aperture. These sensors use either a silicon photodiode for detection in the 350 - 1100 nm range or an InGaAs photodiode for detection in the 800 - 1700 nm, 900 - 1650 nm, or 1200 - 2500 nm wavelength range.

The S180C integrating sphere for 2.9 - 5.5 µm uses two connected, gold-plated Ø20 mm spheres, with an entrance port in the first sphere and a port for the MCT (HgCdTe) detector located in the second sphere. Compared to single-sphere designs, the two-sphere configuration improves device sensitivity by minimizing the internal sphere surface area while still effectively shielding the detector from direct illumination. This design reduces the effect of input angle, divergence, and beam shape on the measurement result by effectively shielding the photodiode without the use of a baffle or other shielding mechanism.

The integrating spheres below feature large Ø5 mm, Ø7 mm, or Ø12 mm apertures, externally SM1-threaded (1.035"-40) front connections, enhanced shielding against electromagnetic interference, and an over-temperature alert sensor. Because of the large active detector areas of these sensors, the included S120-FC fiber adapter can be used with FC/PC- or FC/APC-terminated fiber. The externally SM1-threaded adapter can be removed using a size 1 screwdriver to place components closer to the window. NIST-traceable data is stored in the sensor connector.

Thorlabs offers a recalibration service for these photodiode power sensors, which can be ordered below. See Item # CAL-PD for Si sensors, Item # CAL-IRPD for InGaAs sensors, and Item # CAL-MIRPD for extended InGaAs or MCT sensors.

Item #a S140C S142C S144C S145C S146C S148C S180C
Sensor Image
(Click the Image
to Enlarge)		 S140C S142C S144C S145C S146C S144C Mid-IR Detector
Aperture Ø5 mm Ø12 mm Ø5 mm Ø12 mm Ø5 mm Ø7 mm
Wavelength Range 350 - 1100 nm 800 - 1700 nm 900 - 1650 nm 1200 - 2500 nm 2.9 µm - 5.5 µm
Power Range 1 µW - 500 mW 1 µW - 5 W 1 µW - 500 mW 1 µW - 3 W 10 µW - 20 W 1 µW - 1 W 1 µW - 3 W
Detector Type Si Photodiode InGaAs Photodiode Extended InGaAs Photodiode MCT (HgCdTe)
Photodiode
Linearity ±0.5%
Resolutionb 1 nW 10 nW 1 nW 10 nW
Measurement
Uncertaintyc		 ±3% (440 - 980 nm)
±5% (350 - 439 nm)
±7% (981 - 1100 nm)		 ±5%
Responsivityd
(Click for Plot)
Raw Data
Raw Data
Raw Data
Raw Data
Raw Data
Raw Data
Raw Data
Integrating Sphere
Material (Size)		 Zenith® PTFE
(Ø1")		 Zenith® PTFE
(Ø2")		 Zenith® PTFE
(Ø1")		 Zenith® PTFE
(Ø2")		 Zenith® PTFE
(Ø1")		 Gold Plating
(Two Ø20 mm Spheres)
Head Temperature
Measurement		 NTC Thermistor 4.7 kΩ
Housing
Dimensions		 Ø45 mm x 30.5 mm 70 mm x 74 mm x 70 mm Ø45 mm x 30.5 mm 70 mm x 74 mm x 70 mm Ø45 mm x 30.5 mm 59.0 mm x 50.0 mm x
28.5 mm
Cable Length 1.5 m
Post Mounting 8-32 and M4 Taps
Aperture Thread Included Adapter with SM1 (1.035"-40) External Thread
Compatible Fiber
Adapters		 S120-FC (Included)
S120-APC, S120-SMA, S120-ST, S120-SC, S120-LC, and S140-BFA Bare Fiber Adapter (Not Included)
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm
  • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals except for the S180C. See the S180C responsivity graph to see the NIST-traceable reference points.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S140C Support Documentation
S140CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 500 mW
$745.58
5-8 Days
S142C Support Documentation
S142CIntegrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 5 W
$1,034.50
Today
S144C Support Documentation
S144CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 500 mW
$875.44
Lead Time
S145C Support Documentation
S145CIntegrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 W
$1,074.55
Lead Time
S146C Support Documentation
S146CIntegrating Sphere Photodiode Power Sensor, InGaAs, 900 - 1650 nm, 20 W
$1,074.55
5-8 Days
S148C Support Documentation
S148CCustomer Inspired! Integrating Sphere Photodiode Power Sensor, Extended InGaAs, 1200 - 2500 nm, 1 W
$899.24
5-8 Days
S180C Support Documentation
S180CIntegrating Sphere Photodiode Power Sensor, MCT (HgCdTe), 2.9 - 5.5 µm, 3 W
$3,909.69
5-8 Days

Fiber Photodiode Power Sensors

S150C and PM100D
Click to Enlarge
PM100D with S150C Sensor and FC Cable
  • For Fiber-Based Optical Power Measurements
  • Compact Sensor Integrated into the Connector
  • Integrated Design for use in the Field and Lab
  • Includes PM20-FC Fiber Adapter
    • S150C and S151C Sensors also Include PM20-SMA Adapters
    • Compatible FC/APC, LC/PC, SC/PC, and ST Fiber Adapters Also Available (See Table Below)
  • See the Full Web Presentation for More Information

The S15xC Compact Fiber Photodiode Power Sensor is designed to take power measurements from a wide variety of fiber coupled sources. The compact sensor, integrated into the power meter connector, features a unique integrated design housing the photodiode sensor, fiber coupling, and NIST-traceable data. Standard FC (and SMA - S150C and S151C) connectors are easily interchanged with a variety of standard fiber connectors.

Thorlabs offers a recalibration service for these photodiode power sensors, which can be ordered below (see Item # CAL-PD for Si sensors and Item # CAL-IRPD for InGaAs sensors).

Item #a S150C S151C S154C S155C
Sensor Image
(Click the Image to Enlarge)

S150C

S151C

S152C

S153C
Included Connectors FCb & SMA FCb
Wavelength Range 350 - 1100 nm 400 - 1100 nm 800 - 1700 nm
Power Range 100 pW to 5 mW
(-70 dBm to +7 dBm)		 1 nW to 20 mW
(-60 dBm to +13 dBm)		 100 pW to 3 mW
(-70 dBm to +5 dBm)		 1 nW to 20 mW
(-60 dBm to +13 dBm)
Detector Type Si Photodiode InGaAs Photodiode
Linearity ±0.5%
Resolutionc 10 pW (-80 dBm) 100 pW (-70 dBm) 10 pW (-80 dBm) 100 pW (-70 dBm)
Measurement Uncertaintyd ±3% (440 - 980 nm)
±5% (350 - 439 nm)
±7% (981 - 1100 nm)		 ±3% (440 - 980 nm)
±5% (400 - 439 nm)
±7% (981 - 1100 nm)		 ±5%
Responsivityf (Click for Details)
Raw Data
Raw Data
Raw Data
Raw Data
Coating/Diffuser N/A Absorptive ND (Schott NG3) N/A
Head Temperature Measuremente NTC Thermistor 3 kΩ
Aperture Thread External SM05 (0.535"-40)
Fiber Adapters Included: PM20-FC and PM20-SMA
Optional: PM20-APC, PM20-LC, PM20-SC, and PM20-ST		 Included: PM20-FC
Optional: PM20-APC, PM20-LC, PM20-SC, PM20-ST, and PM20-SMA
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Because of the large active detector area of these sensors, the included PM20-FC fiber adapter can be used with both FC/PC- and FC/APC-terminated fiber. 
  • Measured with PM100D console in low bandwidth setting.
  • For a beam diameter > 1 mm incident on the active area of the detector (i.e. at the detector surface after the light has exited the fiber and passed through any internal optics).
  • This specification is valid for devices with serial numbers 1203xxx and higher. For older versions, please contact technical support.
  • All sensor responsivities are calibrated to a NIST-traceable source with measurements taken in 5 nm intervals.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S150C Support Documentation
S150CCompact Fiber Photodiode Power Sensor, Si, 350 - 1100 nm, 5 mW
$324.64
Today
S151C Support Documentation
S151CCompact Fiber Photodiode Power Sensor, Si, 400 - 1100 nm, 20 mW
$370.09
Today
S154C Support Documentation
S154CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 mW
$466.39
Today
S155C Support Documentation
S155CCompact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 20 mW
$534.57
5-8 Days

High-Resolution Thermal Power Sensors

Item #a S401C S405C
Sensor Image
(Click the Image to Enlarge)		 S401C S405C
Wavelength Range 190 nm - 20 µm 190 nm - 20 µm
Optical Power Range 10 µW - 1 W (3 Wb) 100 µW - 5 W 
Input Aperture Size Ø10 mm Ø10 mm
Active Detector Area
 10 mm x 10 mm 10 mm x 10 mm
Max Optical Power Density 500 W/cm² (Avg.) 1.5 kW/cm² (Avg.)
Detector Type Thermal Surface Absorber (Thermopile)
with Background Compensation		 Thermal Surface Absorber (Thermopile)
Linearity ±0.5% ±0.5%
Resolutionc 1 µW 5 µW
Measurement Uncertaintyd ±3% @ 1064 nm
±5% @ 190 nm - 10.6 µm		 ±3% @ 1064 nm 
±5% @ 250 nm - 17 µm
Response Timee 1.1 s 1.1 s
Cooling Convection (Passive)
Housing Dimensions
(Without Adapter)		 33.0 m x 43.0 mm x 15.0 mm
(1.30" x 1.69" x 0.59")		 40.6 mm x 40.6 mm x 16.0 mm
(1.60" x 1.60" x 0.63")
Temperature Sensor
(In Sensor Head)		 NTC Thermistor NTC Thermistor
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Taps
(Post Not Included)		 Universal 8-32 / M4 Taps
(Post Not Included)
30 mm Cage Mounting - Two 4-40 Tapped Holes &
Two Ø6 mm Through Holes
Aperture Threads - Internal SM05
Accessories Externally SM1-Threaded Adapter
Light Shield with Internal SM05 Threading		 Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U and PM100USB
  • For complete specifications, please see the Specs tab here.
  • For conditions of intermittent use, with a maximum exposure time of 20 minutes for the S401C. The S405C saturates for optical input powers >5 W.
  • Measurement taken with the legacy PM200 console for the S401C and the PM400 console for the S405C. In all cases, the acceleration circuit was switched off. Resolution performance will be similar with our other power meter consoles.
  • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request. 
  • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s). See the Operation tab for additional information.
  • High Resolution of 1 μW or 5 μW
  • S401C and S405C Have Thermistors Used to Monitor Temperature of Sensor Head
  • S401C: Background Compensation for Low-Drift Measurements
  • S405C: Accommodates Average Optical Power Densities up to 1.5 kW/cm²
  • See the Full Web Presentation for More Information

Click to Enlarge
S401C Thermal Sensor with Included Light Shield

Thorlabs offers two broadband thermal power sensors designed to measure low optical power sources with high resolution. Each thermal sensor's broadband coating has a flat spectral response over a wide wavelength range, as shown in the plot below.

An aperture size of Ø10 mm allows for easy alignment and measurement of large-spot-size laser sources. For easy integration with Thorlabs' lens tube systems and SM1-threaded (1.035"-40) fiber adapters, each sensor has either external SM1 threading or includes an externally SM1-threaded adapter.

The S401C uses active thermal background compensation to provide low-drift power measurements. This is implemented through the use of two similar sensor circuits. One sensor circuit is the type all thermal power sensors share: it measures heat flow from light absorber to heat sink. The other sensor circuit monitors the ambient temperature. It is located within the housing and measures heat flow from heat sink towards the absorber. The measurements of the two sensor circuits are subtracted, which minimizes the effect of thermal drift on the laser power measurement. (For information about how the external thermal disturbances can affect thermal power sensor readings, see the Operation tab.) The broadband coating used on this thermal sensor offers high absorption at wavelengths between 0.19 and 20 µm (shown in the graph), which makes the sensor ideal for use with aligning and measuring Mid-IR Quantum Cascade Lasers (QCLs). The included, internally SM05-threaded (0.535"-40) light shield is shown in the photo to the right.

The S405C has internal SM05 (0.535"-40) threading that is directly compatible with SM05 lens tubes, and it can also connect directly to Thorlabs' 30 mm Cage Systems.

Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).

Low Power High Resolution Thermal Sensor Absorption
Click to Enlarge
The S405 shares the same absorption curve with the S415C, S425C, and S245C-L. (All are sold below.)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S401C Support Documentation
S401CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 1 W, Ø10 mm
$785.62
5-8 Days
S405C Support Documentation
S405CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 5 W, Ø10 mm
$746.87
Lead Time

Thermal Sensors for Max Powers of 10 W

Item #a S415C S425C
Sensor Image
(Click Image to Enlarge)		 S415C S425C
Wavelength Range 190 nm - 20 µm 190 nm - 20 µm
Optical Power Range 2 mW - 10 W (20 Wb) 2 mW - 10 W (20 Wb)
Input Aperture Size Ø15 mm Ø25.4 mm
Active Detector Area
 Ø15 mm Ø27 mm
Max Optical
Power Density 		 1.5 kW/cm² (Avg.) 1.5 kW/cm² (Avg.)
Detector Type Thermal Surface Absorber (Thermopile)
Linearity ±0.5% ±0.5%
Resolutionc 100 µW 100 µW
Measurement
Uncertaintyd		 ±3% @ 1064 nm
±5% @ 250 nm - 17 µm		 ±3% @ 1064 nm
±5% @ 250 nm - 17 µm
Response Timee 0.6 s 0.6 s
Cooling Convection (Passive)
Housing Dimensions
(Without Adapter)		 50.8 mm x 50.8 mm x 35.0 mm
(2.00" x 2.00" x 1.38")		 50.8 mm x 50.8 mm x 35.0 mm
(2.00" x 2.00" x 1.38")
Temperature Sensor
(In Sensor Head)		 NTC Thermistor
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Taps
(Post Not Included)		 Universal 8-32 / M4 Taps
(Post Not Included)
30 mm Cage Mounting - -
Aperture Threads Internal SM1 Internal SM1
Removable Heatsink Yes Yes
Accessories Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Two Minute Maximum Exposure Time
  • Measurement taken with the PM400 with the acceleration circuit switched off. Resolution performance will be similar with our other power meter consoles.
  • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request.
  • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s). As the natural response times of the S415C and S425C are fast, these do not benefit from accelerated measurements and this function cannot be enabled. See the Operation tab for additional information.
  • 100 µW Optical Power Resolution
  • Thermistors Used to Monitor Temperature of Sensor Head
  • Removable Heat Sinks Included
  • See the Full Web Presentation for More Information

These thermal power sensors are designed for general broadband power measurements of low and medium power light sources. All include an externally SM1-threaded (1.035"-40) adapter, with threading concentric with the input aperture. The adapters are useful for mounting Ø1" Lens Tubes and Fiber Adapters (available below). The apertures of the S415C and S425C have internal SM1 threading.

These sensors operate with fast (<0.6 s) natural response times, and their removable heat sinks provide a high degree of flexibility to those interested in integrating them into custom setups or replacing the included heat sink with one that is water or fan cooled. If replacing the heat sink, please note that the replacement must provide heat dissipation adequate for the application.

Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).

Thermal Sensor Absorption Mid-Power Thermal
Click to Enlarge
The absorption curves of each of the thermal power sensors designed for use with low and medium power optical sources.
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S415C Support Documentation
S415CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 W, Ø15 mm
$770.21
5-8 Days
S425C Support Documentation
S425CThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 10 W, Ø25.4 mm
$840.23
Lead Time

Thermal Sensors for Max Powers from 40 W to 200 W

Thermal Sensor Absorption Mid-Power Thermal
Click to Enlarge
The absorption curves of each of the thermal power sensors designed for use with low and medium power optical sources.
  • Thermistors Used to Monitor Temperature of Sensor Head
  • S322C Has 4-40 Taps for Use with Our 30 mm Cage Systems
  • S350C Has Ø40 mm Aperture Well Suited to Excimer and Other Lasers with Large Spot Sizes
  • S425C-L Features Removable Heat Sink
  • S322C is Fan Cooled with an Optical Power Range up to 200 W
  • See the Full Web Presentation for More Information

These thermal power sensors are designed for general broadband power measurements of low and medium power light sources. With the exception of the S350C, all include an adapter with external SM1 (1.035"-40) threading concentric with the input aperture. This allows the sensors to be integrated into existing Ø1" lens tube systems in addition to being compatible with fiber adapters (available below). The aperture of the S425C-L has internal SM1 threading.

The S425C-L operates with a fast (<0.6 s) natural response time and has a removable heat sink, which provides a high degree of flexibility to those interested in integrating them into custom setups or replacing the included heat sink with one that is water or fan cooled. If replacing the heat sink, please note that the replacement must provide heat dissipation adequate for the application.

Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).


Item #a S350C S425C-L S322C
Sensor Image
(Click Image to Enlarge)		 S350C S425C-L S322C
Wavelength Range 190 nm- 1.1 µm, 10.6 µm 190 nm - 20 µm 250 nm - 11 µm
Optical Power Range 10 mW - 40 W (60 Wb) 2 mW - 50 W (75 Wb) 100 mW - 200 W (250 Wb)
Input Aperture Size Ø40 mm Ø25.4 mm Ø25 mm
Active Detector Area
 Ø40 mm Ø27 mm Ø25 mm
Max Optical Power Density 2 kW/cm² (Avg.) 1.5 kW/cm² (Avg.) 4 kW/cm² (Avg., CO2) 
Detector Type Thermal Surface Absorber (Thermopile)
Linearity ±1% ±0.5% ±1%
Resolutionc 1 mW 100 µW 5 mW
Measurement Uncertaintyd ±3% @ 351 nm
±5% @ 190 nm - 1100 nm		 ±3% @ 1064 nm 
±5% @ 250 nm - 17 µm		 ±3% @ 1064 nm
±5% @ 266 nm - 1064 nm
Response Timee 9 s
(1 s from 0 to 90%)		 0.6 s 5 s
(1 s from 0 to 90%)
Cooling Convection (Passive) Forced Air with Fanf
Housing Dimensions
(Without Adapter, if Applicable)		 100 mm x 100 mm x 54.2 mm
(3.94" x 3.94" x 2.13")		 100.0 mm x 100.0 mm x 58.0 mm
(3.94" x 3.94" x 2.28")		 100 mm x 100 mm x 86.7 mm
(3.94" x 3.94" x 3.41")
Temperature Sensor
(In Sensor Head)		 NTC Thermistor
Cable Length 1.5 m
Post Mounting M6 Threaded Taps, Includes
Ø1/2" Post, 75 mm Long		 Universal 8-32 / M4 Taps
(Post Not Included)		 M6 Threaded Taps, Includes
Ø1/2" Post, 75 mm Long
30 mm Cage Mounting - - Four 4-40 Tapped Holes
Aperture Threads - Internal SM1 -
Removable Heatsink - Yes -
Accessories - Externally SM1-Threaded Adapter Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM100D,  PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Two Minute Maximum Exposure Time
  • Measurement taken with the PM100D console, except for the S425C-L in which the PM400 was used. In all cases, the acceleration circuit was switched off. Resolution performance will be similar with our other power meter consoles.
  • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request.
  • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <1 s) for the S350C and S322C. As the natural response time of the S425C-L is fast, the S425C-L does not benefit from acceleration and this function cannot be enabled. See the Operation tab for additional information.
  • 12 VDC power supply is included.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S350C Support Documentation
S350CThermal Power Sensor Head, Surface Absorber, 0.19 - 1.1 µm and 10.6 µm, 40 W, Ø40 mm
$1,162.19
Today
S425C-L Support Documentation
S425C-LThermal Power Sensor Head, Surface Absorber, 0.19 - 20 µm, 50 W, Ø25.4 mm
$910.25
Today
S322C Support Documentation
S322CThermal Power Sensor Head, Surface Absorber, 0.25 - 11 µm, 200 W, Ø25 mm, Fan Cooled
$1,439.22
Today

Thermal Sensors for High Max Power Density Laser Pulses

Item #a S370C S470C
Sensor Image
(Click the Image to Enlarge)		 S370C S470C
Wavelength Range 400 nm - 5.2 µm 250 nm - 10.6 µm
Optical Power Range 10 mW - 10 W (15 Wb) 100 µW - 5 W (Pulsed and CW)
Input Aperture Size Ø25 mm Ø15 mm
Active Detector Area
 Ø25 mm Ø16 mm
Max Optical Power Density 35 W/cm² (Avg.); 100 GW/cm² (Peak)
Detector Type Thermal Volume Absorber (Thermopile)
Linearity ±1% ±0.5%
Resolutionc 250 µW 10 µW
Measurement Uncertaintyd ±3% @ 1064 nm 
±5% @ 400 nm - 1064 nm		 ±3% @ 1064 nm 
±5% @ 250 nm - 10.6 µm
Response Timee 45 s
(3 s from 0 to 90%)		 6.5 s
(<2 s from 0 to 90%)
Cooling Convection (Passive)
Housing Dimensions
(Without Adapter, if Applicable)		 75 mm x 75 mm x 51.2 mm
(2.95" x 2.95" x 2.02")		 45.0 mm x 45.0 mm x 18.0 mm
(1.77" x 1.77" x 0.71")
Temperature Sensor
(In Sensor Head)		 N/A N/A
Cable Length 1.5 m
Post Mounting M6 Threaded Taps, Includes
Ø1/2" Post, 75 mm Long		 Universal 8-32 / M4 Tap
(Post Not Included)
30 mm Cage Mounting Four 4-40 Tapped Holes -
Aperture Threads - External SM1
Accessories Externally SM1-Threaded Adapter -
Compatible Consoles PM400, PM100D, PM100A, and PM320E
Compatible Interfaces PM101, PM101A, PM101R, PM101U, PM102, PM102A, PM102U and PM100USB
  • For complete specifications, please see the Specs tab here.
  • Two Minute Maximum Exposure Time
  • Measurement taken with the PM100D console for the S370C and with the legacy PM200 for the S470C. In all cases, the acceleration circuit was switched off. Resolution performance will be similar with our other power meter consoles.
  • Defined as the measurement uncertainty during calibration at the specified wavelengths for a beam diameter > 1 mm. The ±3% specification was determined by laser calibration, and the ±5% specification was determined through spectral calibration, in which values were interpolated using the laser calibration data and the absorption curve for the absorber. Calibration can be performed at 10.6 µm upon request.
  • Typical natural response time (0 - 95%). Our power consoles can provide estimated measurements of optical power on an accelerated time scale (typically <2 s). See the Operation tab for additional information.
  • Designed for Optical Power Measurements of Nd:YAG Lasers
  • Ideal for Applications with High Peak Pulse Powers
  • S370C: Ø25 mm Aperture for Large-Spot-Size Beams
  • S470C: High-Sensitivity for High-Peak-Power Pulses with Low Average Power
  • See the Full Web Presentation for More Information

The S370C and S470C Thermal Sensors are designed to measure short and highly energetic laser pulses. All of these units are post-mountable for free-space applications and feature NIST-traceable data stored in the sensor connector.

These thermal power sensors are unique in that they have thermal volume absorbers, where our other thermal power sensors have thermal surface absorbers. The volume absorber consists of a Schott glass filter. Incident pulses are absorbed and the heat is distributed throughout the volume. In this way, pulses that would have damaged the absorption coating of a thermal surface absorber are safely measured by these thermal volume absorbers. 

The S370C features a large Ø25 mm aperture ideal for large-spot-size beams, and it is compatible with average powers from 10 mW to 10 W (CW).

In comparison, the S470C is faster, as the glass absorber volume is reduced and other design parameters have been optimized for speed. This results in a different optical power range, with the ability to measure powers down to 100 µW. The Ø15 mm aperture is of the S470C is smaller, and it has a lower max average power of 5 W. Its 10 µW resolution is better than the 250 µW resolution of the S370C.

Thorlabs offers a recalibration service for these sensors, which can be ordered below (see Item # CAL-THPY).

Thermal Sensor Absorption Pulsed Lasers
Click to Enlarge
This absorption curve is shown over a broader wavelength range than the sensors' operating ranges. See the table for the operating wavelength range of each sensor.
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+1 Qty Docs Part Number - Universal Price Available
S370C Support Documentation
S370CThermal Power Sensor Head, Volume Absorber, 0.4 - 5.2 µm, 10 W, Ø25 mm
$1,206.56
Today
S470C Support Documentation
S470CThermal Power Sensor Head, Volume Absorber, 0.25 - 10.6 µm, 0.1mW - 5W, Ø15 mm
$1,228.20
Today

Thermal Position & Power Sensors

Item #a S440C S442C
Sensor Image
(Click the Image to Enlarge)
Wavelength Range 190 nm - 20 µm
Optical Power Range 0.5 mW - 5 W 10 mW - 50 W
Input Aperture Size 17 mm x 17 mm Ø17.5 mm
Max Optical Power Density 1.5 kW/cm2
Detector Type Four Thermopiles in Quadrant Configuration
Linearity ±1%
Resolutionb 50 µW 1 mW
Measurement Uncertaintyc ±5% at 1064 nm;
±7% for 250 nm - 17 µm
Position Resolution 5 µm 10 µm
Position Accuracyd 50 µm (Ø1 mm Circle)
200 µm (Ø6 mm Circle)		 100 µm (Ø1 mm Circle)
300 µm (Ø6 mm Circle)
Position Repeatabilityd 15 µm (Ø1 mm Circle)
100 µm (Ø6 mm Circle)		 25 µm (Ø1 mm Circle)
150 µm (Ø6 mm Circle)
Response Timee <1.1 s <0.6 s
Cooling Convection (Passive)
Housing Dimensions
(Without Adapter)		 40.6 mm x 40.6 mm x 8.9 mm
(1.60" x 1.60" x 0.35")		 100.0 m x 100.0 mm x 57.8 mm
(3.94" x 3.94" x 2.28")
Temperature Sensor
(In Sensor Head)		 NTC Thermistor
Cable Length 1.5 m
Post Mounting One 8-32 / M4 Universal Tap Two 8-32 / M4 Universal Taps
30 mm Cage Mounting Four Ø6 mm Through Holes -
Aperture Threads - Internal SM1 (1.035"-40)
Accessories - Externally SM1-Threaded Adapter
Compatible Consoles PM400, PM102, PM102A, and PM102U
  • For complete specifications, please see the Specs tab here.
  • Measured Using the PM400 Console with Acceleration Circuit Switched Off
  • Beam Diameter > 1 mm
  • Valid within the Specified Area at the Center of the Sensor
  • Typical Natural Response Time (0 - 95%)
  • Segmented Quadrant Position-Sensing Detector
  • S440C: High Sensitivity; 30 mm Cage System Compatible
  • S442C: High Power; Heat Sink Included
  • See the Full Web Presentation for More Information

The S440C and S442C position sensors use thermopiles to obtain high-resolution measurements of a beam's position and power. The detector area consists of four thermopile-based sensors arranged as quadrants of a square. The quadrants are mechanically coupled but electrically isolated; thus, heat is free to flow across the entire active area, but the signal from each quadrant measures the response in only that quadrant's thermopile. The XY position of the beam is determined by comparing the signal intensity measured for each quadrant.

The S440C detector is optimized for high sensitivity from 0.5 mW to 5 W. The housing features four Ø6 mm through holes for compatibility with 30 mm cage systems, as well as an 8-32 / M4 universal tap for post mounting. The S442C detector is compatible with higher power levels from 10 mW up to 50 W. The housing includes a heat sink for superior heat dissipation, as well as two 8-32 / M4 universal taps for post mounting.

Both detectors feature C-Series connectors which contain NIST- and PTB-traceable calibraion data. The sensors can be controlled using the PM400 power meter console or PM102 series power meter interfaces. The system can be configured to display a visual trace of the position over time, a graph of the X and Y positions over time, a table of measurement statistics, or a simple numerical readout of the incident power. See the full web presentation and the PM400 manual for details.

For information on recalibration services for these products, please contact Tech Support.

Low Power High Resolution Thermal Sensor Absorption
Click to Enlarge
Click Here for Raw Data
The wavelength range of the data in this graph is limited by the detector used during testing. The thermal position detectors are capable of operating at up to 20 µm.
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S440C Support Documentation
S440CThermal Power Sensor Head, Position Sensing, 0.19 - 20 µm, 5 W, 17 mm x 17 mm
$1,280.00
Lead Time
S442C Support Documentation
S442CThermal Power Sensor Head, Position Sensing, 0.19 - 20 µm, 50 W, Ø17.5 mm
$1,130.00
Today

Pyroelectric Energy Sensors

ES220C with a 30 mm Cage System
Click to Enlarge
ES220C Sensor Mounted in a 30 mm Cage System
  • For General Purpose and High Energy Optical Pulse Measurements
  • Black Broadband Coating with Flat Response Over a Wide Wavelength Range
  • Ceramic Coating with High Damage Thresholds for High-Energy-Density Lasers
  • Sensor Areas from Ø11 mm to Ø45 mm
  • BNC Connector for Oscilloscope Use
  • C-Series Connector Adapter for Use with Compatible Thorlabs Consoles and Interfaces (See Table Below)
  • See the Full Web Presentation for More Information

These Pyroelectric Sensors are designed to measure pulsed coherent and incoherent sources. Pyroelectric sensors are not suited for CW measurements, as they convert energy from light pulses into voltage pulses. A black broadband or ceramic coating is used for low or high power measurements, respectively. Large sensor areas from
Ø11 mm - Ø45 mm allow easy alignment. The energy sensors features BNC connectors for use with an oscilloscope, as well as standard power meter connectors which contain NIST and PTB-traceable calibration data.

These sensors are not compatible with the PM100A Analog Power Meter Console or the PM101 Series Power Meter Interfaces.

Thorlabs offers a recalibration service for these energy sensors, which can be ordered below (see Item # CAL-THPY).

Item #a ES111C ES120C ES145C ES220C ES245C
Sensor Image
(Click the Image to Enlarge)		 ES111C ES120C ES145C ES220C ES245C
Aperture Size Ø11 mm Ø20 mm Ø45 mm Ø20 mm Ø45 mm
Wavelength Range 0.185 - 25 µm
Energy Range 10 µJ - 150 mJ 100 µJ - 500 mJ 500 µJ - 2 J 500 µJ - 3 J 1 mJ - 15 J
Detector Type Pyroelectric Energy Sensor with Black Broadband Coating Pyroelectric Energy Sensor with Ceramic Coating
Resolution 100 nJ 1 µJ 1 µJ 25 µJ 50 µJ
Linearity ±1%
Measurement Uncertainty ±5% @ 0.185 - 25 µm
Housing Dimensions Ø36 mm x 16 mm Ø50 mm x 18 mm Ø75 mm x 21 mm Ø50 mm x 18 mm Ø75 mm x 21 mm
Cable Length 1.5 m
Post Mounting 8-32 Mounting Thread, 8-32 and M4 Insulating Adapters Included
Cage Mounting N/A Four 4-40 Taps for
30 mm Cage Systems		 N/A Four 4-40 Taps for
30 mm Cage Systems		 N/A
Compatible Consoles PM400, PM100D, and PM320E
Compatible Interfaces PM103, PM103A, PM103U, and PM100USB
  • For complete specifications, please see the Specs tab here.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
ES111C Support Documentation
ES111CPyroelectric Energy Sensor, Broadband Coating, 0.185 - 25 µm, 150 mJ
$1,372.12
Today
ES120C Support Documentation
ES120CPyroelectric Energy Sensor, Broadband Coating, 0.185 - 25 µm, 500 mJ
$1,428.39
Today
ES145C Support Documentation
ES145CPyroelectric Energy Sensor, Broadband Coating, 0.185 - 25 µm, 2 J
$1,649.14
Today
ES220C Support Documentation
ES220CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 3 J
$1,715.16
Today
ES245C Support Documentation
ES245CPyroelectric Energy Sensor, Ceramic Coating, 0.185 - 25 µm, 15 J
$1,992.17
Today

Recalibration Service for Photodiode Power Sensors

Calibration Service Item # Compatible Sensors
CAL-UVPD S120VC
CAL-PD S116C, S120C, S121C, S170C, S140C, S142C, S150C, S151C,
PM16-120, PM16-121, PM16-140
CAL-UVPD2 S130VC
CAL-PD2 S130C, PM16-130, PM160
CAL-IRPD S122C, S144C, S145C, S146C, S154C, S155C
PM16-122, PM16-144
CAL-IRPD2 S132C
CAL-MIRPD S148C, S180C

Thorlabs offers recalibration services for our photodiode optical power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Recalibration of a single-channel power and/or energy meter console or interface is included with the recalibration of a sensor at no additional cost. If you would like to have the PM320E Dual-Channel Power and Energy Meter Console calibrated with a sensor or sensors, please contact Tech Support for ordering information.

Refer to the table to the right for the appropriate calibration service Item # that corresponds to your power sensor. Once the appropriate Item # is selected, enter the Part # and Serial # of the sensor that requires recalibration prior to selecting Add to Cart.

Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CAL-UVPD Support Documentation
CAL-UVPDRecalibration Service for S120VC UV-Extended Silicon Photodiode Power Sensor
Part Number:  Serial Number:
$176.00
Lead Time
CAL-PD Support Documentation
CAL-PD Recalibration Service for Single-Power-Range Silicon Photodiode Power Sensors
Part Number:  Serial Number:
$152.57
Lead Time
CAL-UVPD2 Support Documentation
CAL-UVPD2Recalibration Service for S130VC Extended-UV Silicon Photodiode Power Sensor
Part Number:  Serial Number:
$209.00
Lead Time
CAL-PD2 Support Documentation
CAL-PD2Recalibration Service for Dual-Power-Range Silicon Photodiode Power Sensors
Part Number:  Serial Number:
$177.47
Lead Time
CAL-IRPD Support Documentation
CAL-IRPD Recalibration Service for Single-Power-Range Germanium or InGaAs Photodiode Power Sensors
Part Number:  Serial Number:
$172.06
Lead Time
CAL-IRPD2 Support Documentation
CAL-IRPD2Recalibration Service for Dual-Power-Range Germanium or InGaAs Photodiode Power Sensors
Part Number:  Serial Number:
$188.28
Lead Time
CAL-MIRPD Support Documentation
CAL-MIRPDRecalibration Service for Extended InGaAs or MCT Photodiode Power Sensors
Part Number:  Serial Number:
$307.32
Lead Time

Recalibration Service for Thermal Power and Pyroelectric Energy Sensors

Sensor Type Sensor Item #s
Thermal Power S175C, S302Ca, S305Ca, S310Ca, S314Ca,S322C, S350C, S370C, S401C, S405C, S415C, S425C, S425C-L, S470C, PM160T, PM160T-HP, PM16-401, PM16-405
Pyroelectric Energy ES111C, ES120C, ES145C, ES220C, ES245C
  • This former catalog item is now offered as a special.

Thorlabs offers recalibration services for our Thermal Power and Pyroelectric Energy Sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Recalibration of a single-channel power and/or energy meter console or interface is included with the recalibration of a sensor at no additional cost. If you would like to have the PM320E Dual-Channel Power and Energy Meter Console calibrated with a sensor or sensors, please contact Tech Support for ordering information.

Please note that the CAL-THPY recalibration service cannot be used for our Thermal Position & Power Sensors; recalibration for these sensors can be requested by contacting Tech Support.

The table to the upper right lists the sensors for which the CAL-THPY recalibration service is available. Please enter the Part # and Serial # of the sensor that requires recalibration prior to selecting Add to Cart.

Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team. Pyroelectric energy sensors returned for recalibration or servicing must include the separate BNC to DB9 adapter, which contains the sensor EEPROM.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CAL-THPY Support Documentation
CAL-THPYRecalibration Service for Thermal Power and Pyroelectric Energy Sensors at 1064 nm
Part Number:  Serial Number:
$193.68
Lead Time

Recalibration of Single-Channel Power & Energy Meter Electronics

Calibration Service Item # Compatible Consoles & Interfaces
CAL-PM1 PM100D, PM100A, PM400, PM100USB,
PM101 Series, PM102 Series, PM103 Series

This recalibration service is for the power and/or energy meter electronics of our single-channel consoles and interfaces. To ensure accurate measurements, we recommend recalibrating annually. If you would like to recalibrate a sensor with your console or interface, please see the sensor recalibration Item #s above; recalibration of a single-channel console or interface is included with these sensor recalibration services at no additional cost.

The table to the upper right lists the power and/or energy meter consoles and interfaces that can be calibrated using the CAL-PM1 recalibration service. To order the service, enter the Part # and Serial # of the console or interface that requires recalibration prior to selecting Add to Cart.

Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CAL-PM1 Support Documentation
CAL-PM1Recalibration of Single-Channel Power and/or Energy Meter Electronics
Part Number:  Serial Number:
$71.78
Lead Time
Additional Optical Power and Energy Meters
  • Photodiode Power Sensors

  • Thermal Power Sensors

  • Thermal Position & Power Sensors

  • Pyroelectric Energy Sensors

  • Digital Handheld Power & Energy Meter Console

  • Analog Handheld Power Meter Console

  • Power and Energy Meters, USB Interface

  • Touchscreen Power Meter Console with Multi-Touch

  • Power Meter Bundles

  • Dual-Channel Benchtop Power/Energy Meter Console

  • Wireless Power Meter with Sensor

  • Compact USB Power Meters

  • Field Power Meter for Terminated Fibers

  • Power Meter Tutorial