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Why do gas detectors need to be calibrated regularly? Shenzhen Yijunhao Automatic Control Equipment Co., Ltd.

by:Rika Sensors     2021-10-17
Gas detector is an instrumentation tool for gas leakage concentration detection, including: portable gas detector, hand-held gas detector, fixed gas detector, online gas detector, etc. The gas sensor is mainly used to detect the types of gases present in the environment. The gas sensor is a sensor used to detect the composition and content of the gas. When the gas detector is shipped from the factory, the manufacturer will adjust and calibrate the detector, but why should it be calibrated regularly? This is mainly to ensure the accuracy of the gas detector measurement.

The accuracy of the instrument is an important prerequisite for issuing an alarm when the concentration of toxic and harmful gases or combustible gases in the detection environment reaches the preset alarm limit. If the accuracy of the instrument decreases, it will affect the timeliness of the alarm and cause serious consequences or even harm Staff lives.

The accuracy of the gas detector mainly depends on the sensor. Electrochemical sensors and catalytic combustion sensors will be affected by certain substances in the environment during use, and they will become toxic and fail. For example, if HCN sensor is connected to H2S and PH3, the sensor's catalyst will be poisoned and become invalid. LEL sensors may be severely affected by exposure to silicon-based products. The factory manual of our gas detector will emphasize that at least one calibration operation should be done every 12 months; if it is exposed to high-concentration gas, in order to ensure the accuracy of the instrument measurement, a calibration operation should be carried out immediately. This is to ensure that the error of the instrument's test results does not exceed the normal range, and calibration should be carried out regularly. This is also to ensure the personal safety of personnel, and it is not easy to do without calibration.


Another important reason is that the detector will drift over time and when exposed to a gas environment. Therefore, calibration should be carried out regularly. The detector should display as 000 in a normal environment, and if there is a drift, it will display the concentration greater than 0, which will affect the detection result. Therefore, the gas detector should be calibrated regularly to ensure the accuracy of the measurement. It is difficult to suppress the zero drift by other means.





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