What is the critical feature of beam detectors?

The critical feature of beam detectors is their ability to detect smoke along a specific path. This type of detector operates by projecting a beam of light across an area, typically between a transmitter and a receiver. When smoke enters the path of this beam, it scatters and interrupts the light signal, triggering an alarm. This focused detection method is particularly beneficial in large spaces such as warehouses, atriums, or auditoriums, where traditional spot smoke detectors might not cover the area effectively.

Beam detectors are designed to monitor specific zones. Their linear detection path allows for early warning in these environments, which can be crucial for allowing additional time for response in the event of a fire. This characteristic distinguishes beam detectors from other types of detection systems that may offer general area coverage instead of focused monitoring.