The OSI-RE-SS is a reflector- sort linear optical beam smoke detector built to work as a component of fire alarm techniques. The beam operates totally on the theory of sunshine obscuration utilising an Infra-Purple beam. OSI-R-SS can be a 4-wire conventional reflector-style linear optical beam smoke detector to be used https://bookmarkinginfo.com/story18524967/the-ultimate-guide-to-conventional-beam-detectors