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Gas & CO combined alarm with 220v AC + 9v back-up

Features:

-durable sensor head

-self test function

-Visual and audible alarm function

-low voltage warning

-sensor-fault detection

-can be connected with valve

-Hush button in alarm status(press the hush button will enter into silence mode 5-7 mins during alarm mode.)

-detect all sorts of combustible gases, such as coal gas, liquid petroleum gas and natural gas, carbon monoxide and monitor automatically.

Technical figures:

*Power supply:AC220V/50--60Hz & 9V backup battery

*Sensor:Electrochemistry Co and Gas

*Alarm volume:≥85dB within 1 meter

*alarm density:

carbon monoxide:  50PPM :60-90 minutes

                          100PPM:10-40 minutes

                          300PPM:within 3 minutes

                           400PPM: immediately

Coal gas:1000-5000ppm

Liquid petroleum gas(LPG):1000-5000ppm

Natural gas(LNG):1000ppm-5000ppm

Responding time:Gas≤30s

*Alarm output: frequent on or off signal,control exhaust fan,electrical magnetic valve signal.