The Photek PTC-3 intensifier cooling system is designed to operate with image or photon counting intensifiers where the dark count needs to be reduced.

The PTC-3 can cool an image intensifier to a minimum of -40°C (continuous) thus reducing a detector’s dark noise count from around 2000 counts/s (under some circumstances) to less than 20, with no loss of red response. An imaging, or photon counting device which incorporates cooling, is supplied with a Peltier housing around the tube. This needs only to be connected, using the supplied connectors, to either a water supply or re-circulator and the PTC-3.