The beam operates primarily on the basic principle of sunshine obscuration employing infrared. The OSI-RI detector is a mixed transmitter/receiver that could be instantly connected to an intelligent detector circuit in LiteSpeed® or CLIP method. Electric power and connectivity take place inside the imager only as well as the OSID-R https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/