Current Location： Home > News > Chemical Knowledge > Detecting Potential Danger and Ensuring Life Safety -- Principle of Combustible Gas Detector

[Chemical Knowledge]：Detecting Potential Danger and Ensuring Life Safety -- Principle of Combustible Gas Detector

Read： 149 Time：13months ago Source：Transform the World with Simplicity

Combustible gases refer to gases that can be burned under specific conditions, such as natural gas, ethane, propane, ethanol, methane, hydrogen, etc. Because these gases are often used in life and production, once the concentration exceeds the standard, it will cause safety accidents, and even cause personal casualties and large-scale property losses. Therefore, it is necessary to take measures to monitor combustible gas, and timely warning and prevention.

combustible gas detector is a monitoring device to achieve this goal. It detects the concentration of combustible gas in the air through a specific principle, so as to quickly respond and issue a sound and light alarm to remind personnel to avoid danger or take measures to eliminate potential dangers. It is widely used in petrochemical, gas, underground mining and mechanical and electrical manufacturing and other fields to ensure the safety of people's lives. There are various types and principles of

combustible gas detectors. The common ones are infrared, catalytic, electrochemical, semiconductor, etc. Each detector has a different measurement principle and sensitivity range, and different detectors are selected for monitoring according to the application scenario and the target gas.

infrared combustible gas detectors are more commonly used than other types of detectors. The principle is to use combustible gas to absorb radiation at the absorption wavelength of infrared radiation, so as to realize the quantitative detection of gas. Common infrared combustible gas detectors are divided into dual wavelength and single wavelength. Among them, the dual-wavelength detector calculates the gas concentration by using the difference between two infrared rays of different wavelengths absorbed by the target gas, and the accuracy is higher. Single-wavelength detectors, on the other hand, use only one of the specific wavelengths to detect the concentration of the gas. The

catalytic combustible gas detector realizes gas detection through chemical reaction, which has the advantages of high sensitivity and stability, but it has strict requirements on environmental conditions such as temperature and humidity, and is not suitable for applications in harsh environments. The electrochemical combustible gas detector generates current through the battery, and the gas concentration is tested by the current size. This kind of detector has a great influence on oxygen concentration, is vulnerable to interference, and has a relatively low accuracy.

semiconductor combustible gas detector is the use of semiconductor conductivity changes to test gas concentration. In order to make the detector more sensitive, some low-concentration combustible gas detectors also add a reference gas of hydrogen or methane to increase the sensitivity and accuracy of the detector.

When using combustible gas detectors, you need to pay attention to the following points:

1. Choose the appropriate detector according to the target gas, application environment and monitoring range.

2. Regular calibration to ensure measurement accuracy and stability.

3. Use standard gas during calibration to ensure that the difference between standard gas and actual gas is within the allowable error range.

4. When the detector warning, must immediately take refuge or other necessary measures. The emergence of

combustible gas detectors has greatly improved the level of combustible gas monitoring and safety precautions, and has brought great security to industrial production and people's lives. In the future development, more detector types will emerge to meet the needs of different fields and application scenarios, and achieve more comprehensive, accurate and safe monitoring.