The selection of different categories of VOC gas detectors is common: flammable gas detection is more important than toxic gas detection, and acute intoxication gas detection is more important than detection of gases that may cause chronic poisoning. For many of the gases that may exist, a standardized test is required, rather than focusing only on certain gases for detection analysis, and different gas detections are necessary where multiple gases are present. The choice of the VOC gas detector is based on the type and concentration range of the gas.

For example, the flammable VOC gas detector was the right choice, not only because of the simple principle of the flammable VOC gas detector and the broad advantage of its application, but also because of the advantages of easy maintenance and calibration. In the case of toxic and harmful gases such as carbon monoxide and hydrogen sulfide, a specific VOC gas detector is selected to be analysed at field environmental concentrations to ensure safety before staff can enter the operation.
Thus, the selection of the VOC gas detector presupposes first an understanding of the type of gas, and secondly an analysis of whether the gas detector instrument is meeting the detection requirements of the application site, while strictly following the detection process to ensure the safety of the person ' s property.
