The beam operates primarily on the theory of sunshine obscuration applying infrared. The OSI-RI detector is actually a put together transmitter/receiver that may be specifically linked to an intelligent detector circuit in LiteSpeed® or CLIP method. Electric power and connectivity occur while in the imager only as well as OSID-R https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/