Model KGJ16B Methane Sensor, flameproof and I.S. product, is used to detect methane content in the air of coal mines underground. It is an intelligent detection instrument with good reliability and convenient operation and with remote control functions such as zero setting, fineness setting and alarm point setting. The sensor has output of multiple standard signal systems and can be connected with mine-used safety monitoring and control system, locking devices of air-door, electricity and methane, and power cutting-off instruments for methane.