The beam operates totally on the theory of light obscuration working with infrared. The OSI-RI detector can be a mixed transmitter/receiver that can be specifically connected to an clever detector circuit in LiteSpeed® or CLIP method. The 302-ET-194 Thermotech rate-anticipation warmth detector from Honeywell NOTIFIER operates within a managed selection https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/