The OSI-RE-SS is a reflector- form linear optical beam smoke detector created to function to be a element of hearth alarm systems. The beam operates primarily on the principle of sunshine obscuration utilising an Infra-Crimson beam. Beam smoke detectors may be a very important element of the effectively-built automated fireplace https://www.firesense.co.uk/type/conventional-fire-system/conventional-beam-detectors/