High sensitivity. Alarm test button for easy testing. Low battery indicator. Alarm Indication: Red LED flash. Designed for the fastest possible installation. This small gadget will alert and warn people to stay far away from the dangerous field when it detects smoke. This product named Photoelectric detector (hereinafter called detector) detects the smoke by a couple of infrared diodes. The principle of detecting is granule 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 in 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. To reduce the interference and lower power consumption, the emitting circuit adopts the pulse signal.
The detector adopts a special structure design and has dustproof, mothproof, and anti-outside light interference features, etc. The detector is suitable for detecting smoke in a house, shop, hotel, restaurant, office building, school, bank, library, computer house storehouse, etc. Technical Specification: 9V battery (NOT Included). Sound Level:>=85dB/m Operating Temperature: -10°C ~ +40°C Operating Humidity: 95%RH Detecting Area:20 square meter Smoke Sensitivity: 2.36%/FT +/-1.251%/FT OBS.