Cheap smoke detector, Buy Quality smoke detector fire alarm directly from China fire alarm Suppliers: High Sensitivity Stable smoke detector fire alarm Photoelectric Sensor Home Security System with high qualityAvailability:In stock Add to cart Add to Wishlist
High Sensitivity Stable smoke detector fire alarm Photoelectric Sensor Home Security System Attention: We do not send the battery for the smoke detector,because it not safe and increase shipping cost .
Technical Specification: 9V battery ( NOT Included ). Sound Level:>=85dB/m Alarm Current: Standby Current: 300?A Operating Temperature: -10°C ~ +50°C Operating Humidity: 95%RH Detecting Area:20 square meter Smoke Sensitivity: 2.36%/FT +/-1.251%/FT OBS.
How does it works?
This small gadgets will alert and warn people stay far away from danger field when it detected 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 don\'t affect the smoke into it.
While have no smoke, the diode can receive very weak infrared light. When the smoke entering the the chamber, diode can receive more and more light, when the smoke attains the certain density, the detector can give out alarm signal. In order to reduce the interference and lower power consumption, the emitting circuit adopts the pulse signal.
Tags: smoke detector, smoke detector fire alarm, fire alarm, Cheap smoke detector, High Quality smoke detector fire alarm, China fire alarm Suppliers.
|Package Weight||0.2kg (0.44lb.)|
|Package Size||10cm x 8cm x 5cm (3.94in x 3.15in x 1.97in)|
|Type||Independent type smoke detection|
|Size||10.5 x 10.5 x 3.5cm|
|Status||NEW and Stock|