How does a photoelectric smoke detector work? FRONT VIEW OF PHOTOELECTRIC SMOKE DETECTOR LED STATUS INDICATOR LIGHT. Blinks RED when Normal Stay solid RED when in alarm. LED STATUS INDICATOR LIGHT. Blinks RED when Normal Stay solid RED when in alarm.

BACK VIEW OF PHOTOELECTRIC SMOKE DETECTOR COMMON TERMINAL COLLECTOR TERMINAL TRANSMITTER TERMINAL

INSIDE VIEW OF PHOTOELECTRIC SMOKE DETECTOR TRANSMITTER: Emits a Infrared (IR) beam COLLECTOR

Infrared (IR) beam INSIDE VIEW OF PHOTOELECTRIC SMOKE DETECTOR NOTICE: When no smoke is present the IR beam does not hit the collector COLLECTOR

Once the IR beam hits the smoke the beam disperses. When the IR beam is displaced enough it will be picked up by the collector. This will cause the smoke detector to go into alarm. COLLECTOR