The OSI-RE-SS is often a reflector- sort linear optical beam smoke detector designed to run as being a ingredient of hearth alarm units. The beam operates totally on the basic principle of light obscuration utilising an Infra-Red beam. OSI-R-SS can be a 4-wire conventional reflector-variety linear optical beam smoke detector https://minibookmarking.com/story18667812/rumored-buzz-on-conventional-beam-detectors