The beam detector operates according to the extinction principle. It sends infrared light to a reflector that sends it back. False alarms are effectively prevented with an additional distance measurement that detects foreign bodies in the light beam, for example if a fork lift truck accidentally interrupts the beam.
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Early detection of smoke-forming flaming fires e.g. in:- Warehouses- Halls with complex ceiling structures- Factory halls
Sensor and reciever in one housing