The beam operates primarily on the principle of light obscuration using infrared. The OSI-RI detector is a combined transmitter/receiver that can be directly linked to an clever detector circuit in LiteSpeed® or CLIP method. If you are not nonetheless registered, you should enter your e-mail address underneath and click "Carry https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/