Fire Alarm
Photoelectric Smoke Detector
PS - 933
The Photoelectric smoke detector detects the smoke by a couple of infrared diodes. The principle of detection is granules in the smoke can reflect infrared light. Infrared diodes are placed in the special chamber. The chamber can shield external light but doesn't affect the smoke into it. While having no smoke, the diode can receive very weak infrared light. When the smoke enters the chamber, the diode can receive more and more light, when the smoke attains a certain density, the detector can give out an alarm signal.
Feature & Specification
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