How does a photoelectric smoke detector work?

FRONT VIEW OF PHOTOELECTRIC SMOKE DETECTORFRONT 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 DETECTORBACK VIEW OF PHOTOELECTRIC SMOKE DETECTOR

COMMON TERMINALCOMMON TERMINAL

COLLECTOR TERMINAL

COLLECTOR TERMINAL

TRANSMITTER TERMINAL

TRANSMITTER TERMINAL

INSIDE VIEW OF PHOTOELECTRIC SMOKE DETECTORINSIDE VIEW OF PHOTOELECTRIC SMOKE DETECTOR

TRANSMITTER: Emits a Infrared (IR)

beam

TRANSMITTER: Emits a Infrared (IR)

beam

COLLECTORCOLLECTOR

Infrared (IR) beamInfrared (IR) beam

INSIDE VIEW OF PHOTOELECTRIC SMOKE DETECTORINSIDE VIEW OF PHOTOELECTRIC SMOKE DETECTOR

NOTICE: When no smoke is present the IR beam does not hit

the collector

NOTICE: When no smoke is present the IR beam does not hit

the collector

COLLECTORCOLLECTOR

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.

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.

COLLECTORCOLLECTOR