20 Jun 2018 LASER COMPONENTS’ COUNT® series of photon counting modules has been developed to offer a unique combination of high quantum efficiency, wide dynamic range and ease of use for photon counting applications.
Combining our ultra-low-noise avalanche photodiodes with specially developed quenching and signal processing electronics, the COUNT® series offers everything needed for single photon detection from 350 - 1000nm.
From the original COUNT® module, offering excellent detection efficiency in the red, the family has grown to include the COUNT® BLUE and the COUNT® NIR with the former offering unrivalled detection efficiency in the blue and green and the latter offering superior performance at 810nm. Also available in the COUNT® family is the COUNT® S - a passively quenched module featuring a larger active area for a low cost alternative to the original COUNT® module and the COUNT® T - specifically designed for time-correlated single photon counting applications. The COUNT® T both detects and records the time of detection from a reference signal.
More Information https://www.lasercomponents.com/uk/photon-counter/single-photon-counting-modules/ | 
