Optical beam smoke detectors are specially suitable for protecting buildings with big open spaces including warehouses, atriums and many others. OSI-R-SS is a 4-wire conventional reflector-form linear optical beam smoke detector for use in hearth alarm devices. The beam operates primarily on the principle of light obscuration employing an infrared https://todaybookmarks.com/story18665697/the-ultimate-guide-to-conventional-beam-detectors