The beam operates primarily on the theory of sunshine obscuration working with infrared. The OSI-RI detector is a blended transmitter/receiver that could be directly connected 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 array https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/