The beam operates totally on the theory of sunshine obscuration working with infrared. The OSI-RI detector is usually a combined transmitter/receiver that may be immediately linked to an smart detector circuit in LiteSpeed® or CLIP manner. Electricity and connectivity come about during the imager only as well as OSID-R only https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/