Industrial Structures Integrate with local climate Management, fireplace, life security and entry Command units on a single screen. Optical beam smoke detectors are uniquely suited to shielding structures with massive open locations with higher ceilings such as a warehouse or atrium. The OSI-R-SS detector is usually a put together transmitter/receiver https://www.firesense.co.uk/type/conventional-fire-system/conventional-beam-detectors/