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A beam detector is a type of fire detection system that uses a projected beam of light to detect the presence of smoke or fire. The system typically consists of two components: a transmitter that emits a beam of light, and a receiver that detects the beam.
The transmitter emits a beam of infrared light that is directed towards the receiver. The receiver detects the amount of light that is received and compares it to a reference value. If the amount of light received falls below a certain threshold, it triggers an alarm signal to indicate the presence of smoke or fire.
Beam detectors are commonly used in large, open spaces such as warehouses, shopping malls, and airports where traditional smoke detectors may not be suitable due to the high ceilings and airflow patterns. They can also be used in areas where access for maintenance is difficult, as they require less frequent cleaning and calibration compared to traditional smoke detectors.
Overall, beam detectors are a reliable and effective means of detecting smoke and fire in large, open spaces.