Compound gas detector is also called multi-gas detector. This kind of gas detector can detect the concentration of multiple gases at the same time. In many cases, there are two or more gases in the environment. If we need to know their respective concentrations, if we use a single gas detector, we need to use more than one at the same time, which is very inconvenient to use. Therefore, it can be easily solved by using this kind of compound gas detector.

This kind of compound gas detector can simultaneously detect the concentrations of multiple gases by installing multiple gas sensors on one instrument. For example, Doelger x-am2500 gas detector can simultaneously install four kinds of gas sensors, which can simultaneously detect the concentrations of oxygen, hydrogen sulfide, carbon monoxide and combustible gas. This kind of gas detector is also called four-in-one gas detector, and Huarui PGM-6208 gas detector can simultaneously detect the concentrations of six kinds of gases at most.

When using this kind of composite gas detector, it is compact and convenient to use. On the display screen of the gas detector, it can clearly display all kinds of detected gas concentrations at the same time. Moreover, this kind of gas detector can also be matched with various infrared sensors to detect combustible gas and carbon dioxide concentrations, and can also be equipped with PID sensors to detect various VOC gas concentrations, etc. Its functions are much stronger than those of a single gas detector, such as some fall alarm functions and real-time data transmission functions.