The OSI-RE-SS is actually a reflector- kind linear optical beam smoke detector designed to run like a component of fireplace alarm techniques. The beam operates totally on the theory of light obscuration utilising an Infra-Purple beam. OSI-R-SS can be a 4-wire conventional reflector-variety linear optical beam smoke detector for use https://socialistener.com/story4007761/conventional-beam-detectors-an-overview