A smoke detector is an electronic fire-protection device that operates by detecting smoke which is a clear fire indicator and is housed in a plastic enclosure. How does a Photoelectric smoke detector work? This particular smoke detector is a photoelectric detector and thus 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 it has no smoke, the diode can receive very weak infrared light. When the smoke enters the detector, the diode can receive strong infrared light. Through light-electric signal transformation, the detector can send an alarm signal. Affordable Smoke Detector Features These smoke detectors have the following features MCU automatic processing technology Manual test Auto reset Automatic detection Infrared photoelectric sensor Sound-light alarm Strong adaptability to circumstances Smt design, high stability Dustproof, insect-proof, ant-visible light. 10-year warranty Technical smoke detector specifications Special technical specifications on our smoke detectors. ITEM PARAMETER Operating Voltage DC9V Alarm Current ≤20mA;≤50 mA (wireless type) Standby Current ≤10uA Sensitivity 0.08-0.16dB/m Battery Life About 1 Year Indicate Alarm Red LED flash SPL ≥85dB/m Working Temperature -10~ 50˚C Alarm Type Flash and Sound alarm Rg signal (Wireless type) Working Humidity ≤95% RH</td Installing Way Wall-mounted Detecting Area 40 square meters when installation height between 6-12 meters. 20 square meters when installation height within 6 meters
