self contained photoeleetric smoke detector alarm

Description

SMOKE DETECTOR This smoke detector works on the principle that infrared scatters in the smoke to probe the smoke which is generated by the incomplete combustion at the initial stage of the fire. The smoke detector consists of photoelectric system, signal processing identification circuit and alarm circuit. The infrared scatters on the surface of the smoke when the smoke enters the darkroom of the detector, and then the photoelectric diode receives the scattered light and generates the photoelectric signal current. The photoelectric signal generates the alarm signal after being processed by the identification circuit, accordingly the purpose of alarming is achieved. For this smoke alarm, we promise 3 years quality guarantee. Specifications: Photoelectric Smoke Alarm 1) Material: HIPS plastic 2) Assembly no wiring, size: Dia.**7xH*5mm 3) Power supply:9V DC BLOCK battery( included) 4) Standby current: 8Ã?ÂÂ&frac*4;A, Working current: *0mA 5) Environment temperature: **0Ã?°C ~ **0Ã?°C 6) Environment humidity: 0 to *5%(*0Ã?±2Ã?°C) 7) Alarm decibel: louder than *5dB at *0feet(3 meters) 8) Test button:To verify the proper functioning of the detector 9)Low voltage warning: Unit beeps every *0 seconds for 7 days (minimum) to indicate a need of battery replacement *0)Certificates: EN****4, CE and RoHS *1)Smoke sensitivity:2.*6Ã?±1.*1%FT Obscuration *2)3 year quality gurantee