Photomultiplier tubes (PMTs) offer a most cost effective, low light level measurement solution. Because the permutations are many, we don't offer complete PMT systems for the Oriel OPM™, but rather offer the components so you can “build” your own system. Here, we give you an overview of the PMT family, and offer guidance in choosing the components.
Typical responsivity curves of photomultiplier tubes.
The Choices
You need to answer two questions in order to choose the appropriate PMT components to build a system:
1. What wavelength range do you need?
We have PMTs that are sensitive in the UV, as low as 160 nm, and in the NIR as high as 1100 nm (see the responsivity curves).
2. Do you want a side-on or end-on PMT?
Side-on PMTs are more economical; the end-on systems have a larger photocathode area and have a more uniform responsivity.
What Do I Need to Build a System?
To build a complete OPMTM PMT System, you need:
- End-on or Side-on PMT
- 70680 Side-on or 77265 End-on PMT Housing
- 70705 PMT Power Supply
- Oriel OPMTM (Optical Power Meter)
|
Model |
Wavelength Range |
Peak Wavelength |
Cathode Responsivity* |
Photocathode Size |
NEP*
(W Hz-1/2) |
Supply Voltage |
| 77340
|
185-650 |
340 nm |
48 mA/W |
8 x 24 mm2 |
1.4 x 10-16 |
1000 |
| 77341
|
185-870 |
330 nm |
40 mA/W |
8 x 24 mm2 |
2.8 x 10-16 |
1000 |
| 77343
|
400-1000 |
730 nm |
1.9 mA/W |
8 x 24 mm |
1.2 x 10-13 |
1250 |
| 77348
|
160-900 |
400 nm |
68 mA/W |
8 x 24 mm |
1.2 x 10-16 |
1000 |
| 77360
|
185-850 |
420 nm |
70 mA/W |
8 x 16 mm |
5.0 x 10-16 |
1000 |
| 77346
|
185-850 |
420 nm |
64 mA/W |
25 mm dia. |
6.6 x 10-16 |
1000 |
| 77361
|
400-1100 |
800 nm |
1.9 mA/W |
25 mm dia. |
4.2 x 10-13 |
1250 |
*Typical values at the supply voltage listed.
