In the process of industrial safety production, explosive flammable gases and toxic and harmful gases may be generated. Gas detectors are a barrier to ensure the safety of production workers. So, how to choose a suitable gas detection alarm?

Firstly, it is necessary to clarify the types of gases that need to be detected, such as explosive flammable gases such as methane and hydrogen, or toxic and harmful gases such as oxygen, carbon monoxide, hydrogen sulfide, ammonia, and other components.

Secondly, it is necessary to determine whether the purpose of gas detection is to measure explosive properties or gas concentration properties.

The types of combustible gases used to measure explosive properties include methane, hydrogen, propane, isobutane, and other combustible gases.

The gases used to measure concentration properties include methane, oxygen, carbon monoxide, hydrogen sulfide, hydrogen, sulfur dioxide, ammonia, etc.

From the above, it can be seen that gases such as methane and hydrogen can be used to measure both explosive and concentration properties. To achieve accurate detection, it is necessary to have a clear understanding of the purpose of gas detection.

If you are not very clear about the types of gases to be detected and the purpose of the detection, you can provide recommendations from professional technicians on the places where gas leaks occur. The approximate places where gas is generated or needs to be detected are as follows:

Fire combustible demand: generally measuring explosive properties, such as combustible gases, hydrogen, methane and other combustible gases;

Safety production requirements: Generally measure gas concentration, such as ammonia detection in a freezer, and of course, explosive properties such as methane can also be measured;

Environmental monitoring requirements: general measurement of VOCs, ozone, nitric oxide, nitrogen dioxide, sulfur dioxide, ammonia, etc;

Production process control requirements: Generally measure gas concentration to meet the requirements of production process control, such as ozone, nitrogen, oxygen, etc;

Research and testing requirements: Generally measuring gas concentration, there are various gas requirements.

After determining the type of gas, it is necessary to determine the measurement range and detection principle for detecting the gas, as selecting the appropriate measurement range has a direct impact on the detection accuracy. If the range selection is too small, exceeding the range will damage the gas sensor. If the range selection is too large, the detection accuracy will not meet the requirements. In addition, it is necessary to determine the detection principle. For example, methane can be detected using sensors based on catalytic combustion principle or sensors based on infrared principle. Different detection principles result in significant price differences.

Finally, determine the gas detection method. Whether to choose a fixed online instrument for testing or a portable handheld instrument for testing, the fixed online instrument must determine whether to use RS485 signal or current signal (divided into three wire system and two wire system), whether to equip with sound and light alarm, whether to equip with gas alarm controller, etc. It is also necessary to determine whether it is single gas detection or multi gas composite detection, etc.

Through the above explanation by the editor, I believe you have gained a certain understanding of the selection of gas detectors. If you are not sure what gases are generated in industrial safety production, please leave a comment in the comment section, describing the working conditions and environment of gas detection, the types of products produced, the types of raw materials used, and the specific production process. The editor will recommend a suitable gas detector selection plan for you.