The beam operates primarily on the principle of light obscuration utilizing infrared. The OSI-RI detector is actually a blended transmitter/receiver which can be right linked to an smart detector circuit in LiteSpeed® or CLIP manner. Electricity and connectivity come about during the imager only plus the OSID-R only needs a https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/