Gas detector is mainly used for the detection of toxic, harmful and combustible gases. Combustible gas detector, toxic gas detector in coal, petroleum, chemical industry, gas transmission and distribution, biochemical medicine and other fields have applications, for all kinds of different production occasions and testing requirements, the choice of appropriate gas detector is every safety and health work personnel must pay attention to.

1. Choose a gas detector to first confirm the type and concentration range of the gas to be tested: each production department encountered a different type of gas. All possible scenarios should be taken into account when selecting a gas detector. If methane and other less toxic alkanes are in the majority, the LEL detector is the most appropriate choice. This is not only because the LEL 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 toxic gases are present, it is necessary to select a specific gas detector in order to ensure the safety of workers. If there are more organic toxic and harmful gases, considering the low concentration that may cause human poisoning, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amine), ethers, alcohols, lipids, etc., the photoionization detector should be selected, and never use LEL detector to deal with, because this may lead to human casualties. If the gas type covers the above gases, choosing a compound gas detector may achieve twice the result with half the effort.

2. Determine the use of the occasion: different industrial environment, the choice of gas detector type is also different. Stationary gas detector: this detector is widely used in industrial installations and production processes. It can be installed at specific detection points to detect specific gas leaks. The fixed detector is generally a two-body type. The detection head composed of sensor and transformer is installed in the detection site as a whole. The secondary instrument composed of circuit, power supply and display alarm device is installed in a safety place as a whole to facilitate monitoring. Its detection principle is the same as described in the preceding section, but in terms of process and technology, it is more suitable for the characteristics of continuous and long-term stability required by fixed detection. They should also be selected according to the type and concentration of the gas in the field, and care should be taken to install them in the place where a particular gas is most likely to leak, such as selecting the most effective height to install the sensor based on the specific gravity of the gas, etc.

3. Portable gas detector: Portable gas detector is easy to operate and small in size, which can be carried to different production sites. The electrochemical detector is powered by alkaline battery and can be used for 1000 hours continuously. New LEL detectors, Pids, and compound instruments use rechargeable batteries (some already use memoryless nickel metal hydride or lithium ion batteries) that allow them to operate for nearly 12 hours continuously, so gas detectors are increasingly being used as such in factories and health departments.

Life is very important, as a staff to do a good job from the details of every step, every link. In this way, you are not only responsible for the safety of your own life, but also for the safety of others.