The beam operates totally on the basic principle of light obscuration making use of infrared. The OSI-RI detector can be a merged transmitter/receiver that could be instantly linked to an clever detector circuit in LiteSpeed® or CLIP method. I conform to Ampac giving application updates, item updates, features and promotions https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/