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