MP100 can accurately detect more than 21 kinds of toxic and harmful gases besides oxygen. Double buttons makes operation more simple and convenient; super visibility display makes it easy to perceive instrument information; solid and reliable shell design makes it endurable in the harsh conditions; users can quickly learn the alarm information through red LEDs. Functional testing and calibration can be easily completed manually, and can be managed by MP300T1 automatic calibration and management platform. Therefore, MP100 can be widely used in petroleum, petrochemical, metallurgical, chemical industries.