Optical beam smoke detectors are significantly suitable for safeguarding buildings with big open up Areas including warehouses, atriums and so on. OSI-R-SS is often a four-wire conventional reflector-form linear optical beam smoke detector to be used in hearth alarm units. The beam operates totally on the principle of sunshine obscuration https://www.firesense.co.uk/type/conventional-fire-system/conventional-beam-detectors/