The OSI-RE-SS is a reflector- type linear optical beam smoke detector designed to work to be a ingredient of hearth alarm techniques. The beam operates primarily on the principle of sunshine obscuration utilising an Infra-Purple beam. OSI-R-SS is usually a four-wire conventional reflector-variety linear optical beam smoke detector for use https://7bookmarks.com/story18447367/not-known-factual-statements-about-conventional-beam-detectors