The OSI-RE-SS is actually a reflector- sort linear optical beam smoke detector created to function as being a component of hearth alarm methods. The beam operates totally on the principle of sunshine obscuration utilising an Infra-Crimson beam. Optical beam smoke detectors are uniquely suited to safeguarding buildings with substantial open https://www.firesense.co.uk/type/conventional-fire-system/conventional-beam-detectors/