Summary: The fixed online gas detector adopts high-performance intelligent gas sensor, which is an online detection instrument that can continuously monitor toxic and harmful gases, combustible gases, oxygen, carbon dioxide, volatile organic compounds VOC and TVOC. The detector uses more than 30 kinds of plug-and-play intelligent sensors, including original imported PID photoion sensors, electrochemical toxic gas sensors, oxygen, catalytic combustion sensors and infrared CO2 sensors, infrared CH4 sensors, to meet the detection needs of different industries. The overall flameproof structure of the detector has stable signal, high sensitivity and precision. The detector can realize real-time concentration display on the computer through the gas alarm controller and monitoring management software, and can also transmit real-time data and alarm status to the safety control center through the optional wireless module. It can be widely used in petroleum, petrochemical, metallurgy, environmental protection, gas, fire protection, municipal, pipe gallery, chemical, shipbuilding, electric power, process control, sewage treatment, emergency rescue monitoring and other industries.