The beam operates totally on the principle of light obscuration applying infrared. The OSI-RI detector is often a blended transmitter/receiver that may be directly linked to an smart detector circuit in LiteSpeed® or CLIP mode. Energy and connectivity occur during the imager only plus the OSID-R only needs a single https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/