Gas Detectors Require Regular Calibration and Testing
Gas detectors are operated and measured using a relative comparison method, first calibrating the gas detector with a zero gas and a standard concentration of gas. Toxic and harmful gas detectors are also similar to other analytical gas detectors. The standardized curve is stored in a gas detector. During measurement, the gas detector compares the electrical signal generated by the concentration of the gas to be measured with the electrical signal of the standard concentration, and calculates the accurate gas concentration value.
Therefore, it is essential to perform zero calibration on the gas detector at any time and regularly calibrate the gas detector to ensure accurate measurement. It should be noted that many gas detectors currently have replaceable detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time. Whenever replacing the probe, in addition to requiring a certain sensor activation time, it is also necessary to recalibrate the gas detector operation. In addition, it is recommended to perform response testing with standard gas before using various gas detectors to ensure that the gas detectors truly function for maintenance.
Working principle of gas detector
1, Combustible gases generally work using the principle of catalytic combustion. The combustible gas alarm device based on the principle of catalytic combustion has mature technology and some domestic products have relatively stable performance. But the sensors are also imported. Due to market competition, imported brands also have a significant price advantage. Customers are advised to choose products such as MC2-0W00-Y-CN from BW Canada, Honeywell Impulse X1, GB90 from Industrial Scientific, XP-3110, XP-3140, XP-3160 from New Universe with higher precision, or GP-88S, GP-88A, RX-415 from RIKEN, as well as PACEX2 and X-AM 2000 from Delger.
2, Toxic gases generally work based on electrochemical principles, and electrochemical sensors are currently mainly imported. Therefore, it is recommended to use imported brands. Domestic ones can achieve a certain level of accuracy, except for measuring carbon monoxide,
hydrogen sulfide, and oxygen, but their accuracy cannot meet the requirements. Imported Canadian BW with high cost-effectiveness
3, The working principle of combustible semiconductors is widely used in the combustible gases of Japan's new universe
4, The infrared working principle is generally used for carbon dioxide and combustible gases. The gas sensor that works on this principle is expensive, but has a long service life and stable performance, making it very suitable for use on offshore operating platforms and in some extreme environments.
