A CO2gas detection method is designed by using a sensor which absorbs CO2.The principle and constitute of its is expatiated.The result indicates that the resolution is 0.001 % using this method

the difference between it and gas chromatography measuring device is less than 3 %.It has many advantages such as wide range of measurment

higher sensitivity

fast response

better selectivity

strong anti-disturb and so on.It’s easy to use

inexpensive display visual

and has better application foreground.