The beam operates primarily on the principle of sunshine obscuration making use of infrared. The OSI-RI detector is usually a blended transmitter/receiver that can be right linked to an clever detector circuit in LiteSpeed® or CLIP method. Ability and connectivity happen while in the imager only and the OSID-R only https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/