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OBB’s PMT housing will accept a wide variety of side-on 1 1/8-inch diameter photomultiplier tubes. It is optimized for PMTs with uniform dynode chains. PMTs are normally selected based on their wavelength response and their noise and/or sensitivity characteristics. OBB offers four different PMTs, as standard, for use with our PMT housing. We can and do offer special PMTs for custom applications.
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| Spectral Response |
185 to 650 nm |
185 to 900 nm |
185 to 680 nm |
185 to 810 nm |
| Wavelength of Maximum Response |
340 nm |
400 nm |
400 nm |
350 nm |
Cathode Sensitivity
Luminous
Radiant at 400 nm |
40 µA/lm
48 mA/W |
250 µA/lm
74mA/W |
60 µA/lm
60 mA/W |
45 µA/lm
40 mA/W at 350 nm |
Anode Sensitivity (at 1000 V)
Luminous
Radiant at 400 nm |
400 A/lm
4.8 x 105 A/W |
2500 A/lm
7.4 x 105 A/W |
400 A/lm
4.0 x 105 A/W |
100 A/lm
9x104 A/W at 350 nm |
| Gain |
1 x 107 |
1 x 107 |
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2.2 x 106 |
| Low Dark Current |
5 nA |
3 nA |
0.1 nA |
2 nA |
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