1. Confirm the type of gas to be detected and the detection range.
The type of gas produced in each factory environment is different, and all possible situations must be considered when selecting a gas detector. If methane and other less toxic alkanes are predominant, it is undoubtedly more appropriate to choose a combustible Ex detector. This is not only because the combustible Ex detector is simple in principle and widely used, but also has the characteristics of easy maintenance and calibration. If carbon monoxide, hydrogen sulfide and other gases exist, a specific gas detector must be selected first to ensure worker safety. If it is more volatile organic gas, considering the low concentration that may cause personnel poisoning, such as hydrocarbons, halogenated hydrocarbons, oxyhydrocarbons and nitrogen hydrocarbons, you should choose PID photoionization detector, and absolutely not Use a common tester.
2. Confirm the operating environment of the gas detector
The choice of gas detectors is different in different industrial environments.
(1) Fixed gas detector
This is a detector used more in the industrial production process. It can be installed at a specific detection point to detect a specific gas leak. It is more suitable for the continuous and long-term stability required by fixed detection. The gas detector should also be selected according to the type and concentration of the on-site gas. At the same time, they should be installed at the location where the specific gas may leak, for example, the distance between the gas detector and the ground height should be selected according to the specific gravity of the gas.
(2) Portable gas detector The portable gas detector instrument is easy to operate, compact, and can be carried to different production parts. It is powered by a lithium battery. The general battery life can reach 1 day (determined by the number of alarms). The application of such instruments in various factories and health departments Getting wider and wider. When choosing a portable gas detector, it is also necessary to select the appropriate instrument according to the toxic gas composition and concentration of the detection site environment. In addition, if you need to detect the gas components in the enclosed space, you need to choose a pump-type detector.
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