PMT Housing for Side-On Hamamatsu PMTs

  • Light-Tight Design Securely Holds PMT via Threaded Retaining Collar
  • 30 mm Cage and SM1 Lens Tube Compatible
  • Post Mountable via 8-32 (M4) and 1/4"-20 (M6) Taps

Application Idea


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Compatible Hamamatsu PMTs

The PXT1 Housing will form a light-tight connection with any Ø1-1/8" barrel side-on Hamamatsu PMT, including the following items.

• 1P21 • R11715-10 • R2949 • R636-10 • R8487
• 1P21P • R12829 • R3788 • R636P • R9110
• 1P28 • R12896 • R3896 • R6925 • R9110P
• 1P128A • R13096 • R4220 • R7154 • R9182.01
• 931A • R13456 • R4220P • R7446 • R9220
• 931B • R1527 • R4332 • R7447 • R928
• R10491 • R1527P • R446 • R7447P • R928P
• R105 • R212 • R4632 • R7517 • R955
• R105UH • R212UH • R508 • R7518 • R955P
• R10699 • R2658 • R5108 • R7518P • R9876
• R11540 • R2658P • R5983 • R758-10
• R11558 • R2693 • R5983P • R7639
• R11568 • R2693P • R5984 • R8486


  • 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 provides a compact, light-tight mounting solution for integrating Ø1-1/8" barrel side on photomultiplier tubes (PMTs) into Thorlabs' SM1 (1.035"-40) lens tubes and 30 mm cage system, eliminating the need to design custom adapter plates for these PMTs. 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.

Solidwork Drawing of PMT in Housing
Solidworks Drawing of PMT in Housing
solidworks drawing cross section showing PMT in housing
Housing Cross Section

Posted Comments:
Sangsub Kim  (posted 2020-09-21 03:13:59.613)
Hamamtsu R9182-01 is marked as compatible with the PXT1 product. However, in the case of R9182-01, it seems that it will not fit into the PXT1 product because it has an insulation cover. I really want to know if R9182-01 is compatible with PXT1.
llamb  (posted 2020-09-25 08:42:13.0)
Thank you for contacting Thorlabs. The insulation cover on Hamamatsu's R9182-01 PMT would need to be removed for fitting into the PXT1. While Hamamatsu generally doesn't offer support on their PMT after that cover is removed, doing so will indeed allow it to be compatible with the PXT1. The outermost tube can be easily peeled off by making a cut with a blade. Then, the paint inside can be washed off with water. In the case of R9182-01, if water gets in through the gap of PMT body and base part, it may cause a short circuit, so caution will have to be used if you choose to remove the insulation cover. I have reached out to you directly as well to discuss this further.
david.hill  (posted 2017-06-28 11:11:43.157)
Hello, I was wondering if this product will also fit Newport PMTs, like Newport #77348. Thanks
tfrisch  (posted 2017-08-03 12:11:29.0)
Hello, thank you for contacting Thorlabs. Looking at both drawings, it appears that that PMT has a larger diameter than our housing is designed to hold. I will reach out to you directly to discuss your application.
sdmt99  (posted 2015-04-12 23:17:43.713)
Hi, I have a Hamamatsu H10723 PMT which doesn't fit with your PMT housing. Maybe thorlabs could consider developing housings for the kind of PMT I mentioned?
jlow  (posted 2015-04-28 04:38:21.0)
Response from Jeremy at Thorlabs: Thank you for the feedback. We will look into providing housing for other Hamamatsu PMT.
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