These devices count the number of pulses, discriminating on pulse heights. They are appropriate for very fast sensors like scintillators or photodiodes.
CM100
Particle Therapy Control Console
CP15AF
Pulse Pre-amplifier for Sodium Iodide Scintillation Detectors
CP10
Very Fast Pulse Spectroscopy Pre-amplifier
CR10
Spectroscopy Amplifier, Charge Sensitive Pulse Shaping
C400
Four Channel Pulse Counter