The beam operates primarily on the principle of sunshine obscuration employing infrared. The OSI-RI detector is actually a mixed transmitter/receiver which can be specifically linked to an clever detector circuit in LiteSpeed® or CLIP mode. Unwanted alarms a result of the beam remaining totally obscured for a short stretch of https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/