The PXT1 provides a compact light-tight mounting solution for integrating Ø1-1/8" barrel side on photomultiplier tubes (PMTs) into Thorlabs' SM1 (Ø1.035"-40) lens tubes and 30 mm cage systems. A complete list of compatible Ø1-1/8" barrel , side-on Hamamatsu PMTs has been provided.

• Active Area of PMT Centered in SM1 Threaded Bore
• Light-Tight Mounting of PMT into PXT1 Housing
• Light-Tight Mounting of Filters and Imaging Optics Using
  SM1 (1.035"-40) Lens Tubes
• Optical Axis Defined by Cage and Lens Tube Compatibility
  Simplifies Alignment
• Easily Mount Imaging and Filtering Optics on the Optical Axis

The PXT1 photomultiplier tube housing eliminates the need to design custom adapter plates when integrating a Hamamatsu PMT into an optical setup because the PXT1 is compatible with Thorlabs' extensive line of 30 mm Cage and SM1 (1.035"-40) Lens Tube components. In addition, a wide range of adapters are available to support alternative mounting options. For post mounting, the PXT1 body features 8-32 and 1/4"-20 taps, while the PXT1/M has M4 and M6 taps.

To insert the PMT into the PXT1, first remove the retaining collar. As seen in the drawings below, the PMT is slid into the main body of the PXT1 PMT housing and then the retaining collar can be screwed on to lock the PMT in and provide a second light tight seal.