The beam operates primarily on the principle of light obscuration employing 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 method. The 302-ET-194 Thermotech fee-anticipation warmth detector from Honeywell NOTIFIER operates inside of a controlled selection https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/