The beam operates primarily on the principle of light obscuration working with infrared. The OSI-RI detector is a mixed transmitter/receiver that could be instantly connected to an intelligent detector circuit in LiteSpeed® or CLIP method. The FSP-951 photoelectric detector’s special optical sensing chamber is engineered to perception smoke produced by https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/