The beam operates totally on the basic principle of sunshine obscuration applying infrared. The OSI-RI detector is a mixed transmitter/receiver that may be immediately connected to an smart detector circuit in LiteSpeed® or CLIP mode. The 302-ET-194 Thermotech fee-anticipation warmth detector from Honeywell NOTIFIER operates in just a managed choice https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/