The beam operates totally on the principle of light obscuration applying infrared. The OSI-RI detector is actually a merged transmitter/receiver that can be right linked to an intelligent detector circuit in LiteSpeed® or CLIP method. Power and connectivity happen while in the imager only as well as OSID-R only requires https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/