The beam operates primarily on the basic principle of sunshine obscuration working with infrared. The OSI-RI detector can be a blended transmitter/receiver that may be straight connected to an clever detector circuit in LiteSpeed® or CLIP method. If You're not yet registered, please enter your e-mail deal with under and https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/