The beam operates totally on the principle of sunshine obscuration using infrared. The OSI-RI detector can be a combined transmitter/receiver that could be straight linked to an clever detector circuit in LiteSpeed® or CLIP method. I agree to Ampac delivering software updates, solution updates, delivers and promotions by means of https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/