The PDM02-9111-TTL is a compact, rectangular format photon counting module incorporating a high sensitivity, low noise, 25mm diameter photomultiplier, a fast amplifier-discriminator, and a low power high-voltage supply. The combination of high-speed electronics and fast photomultiplier with low dark counts enables a wide dynamic range to be achieved. A positive polarity high-voltage supply is used for maximum count rate stability at very low light levels and the spectral range is 280-630nm.
The TTL output of the PDM02-9111-TTL is fully compatible with the MCS-CT3 multi-channel scaler/counter timer module for use in photon counting applications with a very wide dynamic range. The photomultiplier high-voltage and discriminator threshold level are pre-set for optimum performance, enabling photon counting operation simply by connecting to a +5V supply (which can be derived from the MCS-CT3).
- dynamic range from about 50cps to 100 Mcps (with count rate correction)
- 22mm diameter photosensitive input area
- other spectral range options
- low power consumption (approx 500mW)
- easy to use
|active diameter (typical)||22mm|
|quantum efficiency at peak (typical)||28%|
|TTL high level (terminated)||3.3V|
|dark count rate (typical, at 20°C)||100cps|
|signal count rate (with correction)||max 100Mcps|
|supply current (at signal=150Mcps)||120mA|
|temperature range (operating)||+5 to +55 deg C|