The GTH1000(A) carbon monoxide sensor for mines is mainly used to monitor the concentration of carbon monoxide gas in mines. It is capable of continuously and automatically converting the underground carbon monoxide concentration into standard electrical signals and transmitting them to the associated equipment. It has the functions of local display of concentration, over-limit sound and light alarm, etc. This sensor has been subject to online inspection by the national explosion-proof test agency. It can be used with monitoring systems in China. It is applicable to fixing on mining faces, ventilation roadways, goafs and gas drainage pipelines prone to spontaneous combustion.