This product SR-x821THS is an intelligent combined carbon and smoke detector, which adopts micro-processing control and electrochemical sensor, featuring high stability, low power consumption and small sensitivity drift. It is mainly used in places where carbon monoxide gas leakage and fire may occur, ensuring personal life safety.

 Main features
* The carbon smoke detector adopts high reliability electrochemical sensor and infrared photoelectric sensor
* LCD liquid crystal display density
* 3*1.5V AA battery powered
* Low current consumption, long standby life
* Battery low battery prompt
* Alarm memory function for the carbon and smoke detector
* Alarm pause (silent mode)
* Sound and light alarm / LED indicating alarm
* SMT industrial manufacturing, strong stability

Technical specification
Model No.    SR-x821THS（carbon smoke detector）
Operating voltage:    3*1.5V AA battery (3 AA 1.5V)
Quiescent current:    <80uA
Alarm current:    <30mA
Alarm output:    sound and light tips
Sensor:    Electrochemical Carbon Monoxide Sensor and Infrared Photoelectric Sensor
Working temperature:    0-50 °C
Working humidity:    relative humidity 10%-95%
Carbon monoxide gas detection concentration:    000~999 PPM
Smoke sensitivity:    0.1% db/m-9.9% db/m
 Battery display:    low battery alarm
Dimensions:    104*39mm