Product description:

Gas detected: Gas, Carbon monoxide and smoke 
Power supply: 12V DC,110VAC~240VAC
Electrochemistry type sensor(Japan)
Working voltage: 5VDC                               
Alarm volume: ≥80dB  
Working environment: temperature:0ºC～50ºC Humidity: ≤97%RH                              
Alarm density:

1)Coal gas: 1000~5000ppm

2)Liquid petroleum gas: 1000~5000ppm

3)natural gas: 1000~5000ppm 

4)Carbon monoxide : 50~400ppm

5)Smoke:0.4%~2.0%
Responding recovery time:Gas ≤30S 
CO level(PPM)    50PPM      100PPM      300PPM                 400PPM
responding time       60-90min     10-40min     less 3 min         Immediately
Alarm output: normally open and closed signal, control exhaust fan, electrical magnetic valve signal.
Size: 163mm*90mm*40.7mm