How Photoelectric Smoke Detectors Work
Within the alarm unit, there is a sensing chamber that contains a light-sensitive sensor and light-emitting diode. When suspended smoke particles are present in the chamber, they scatter the light beam from the diode. This sensor picks up this interruption to the light and scattered beams and triggers the alarm to sound.
Why Use Photoelectric Smoke Detectors?
Unlike ionization smoke alarms which rely on visible flames to trigger the alarm, photoelectric alarms are sensitive to particles created by smoke. This means a more rapid response and enhanced opportunity for escape should a genuine emergency be occurring.