Optical beam smoke detectors are particularly suitable for guarding buildings with huge open Areas such as warehouses, atriums etc. OSI-R-SS is a four-wire conventional reflector-form linear optical beam smoke detector to be used in fire alarm methods. The beam operates totally on the theory of light obscuration utilizing an infrared https://trackbookmark.com/story19989652/conventional-beam-detectors-no-further-a-mystery