Photomultiplier (CPM) Modules
(CPM Counting Module (TTL))

Photon Counting Module CM-series (TTL-out)

The Photon Counting Module CM (TTL-out) series is designed for applications in all fields of single photon detection, e.g. chemo-luminescence, bioluminescence, in-vitro assay, environmental measurements or pure research. It is an easy to use module, containing the Customized Photomultiplier, a high voltage power supply, a discrimination amplifier and a pulse shaper for fast output pulses. An installed active quenching system avoids over- illumination to the detector.

It is also possible to apply an external gate function for time correlated photon counting. Strong variations in light levels are possible due to the high dynamic range of the installed CPM. The exceptional low noise and high sensitivity facilitates detection of extremely weak light levels.



  • Extremely low background noise
  • Best low light level detection limits
  • High dynamic range & gain
  • Low microphonic & magnetic sensitivity
  • Compact size & rugged design
  • Multiple photocathode and window selections
  • Plug and play for shortest design-in and time-to-market
  • Customizations and added features available



  • Photon Counting
  • Luminescence & Fluorescence Spectroscopy
  • Microplate Readers
  • Clinical Diagnostics
  • DNA & Cell Analysis
  • Particle Measurements
  • Nucleic Acid Amplification (PCR)
  • Hygiene Monitoring

Configuration parameters


  • Wavelength of interest: 115nm to 900 nm
  • Active diameter: 5mm, 15mm, (9mm upon request)
  • Input windows: MgF2, Quartz, UV-Glass, Borosilicate Glass
  • Photocathodes: CsTe, CSI, Bialkali, Low Noise Bialkali, Yellow Enhanced, Multialkali (S20), Multialkali Red Enhanced (S25)



Besides the standard configuration we do also take into account application-specific requirements. Thus we invite our customers to provide such information. Confidentiality is of course guaranteed.