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Why the gas detectors need calibration periodically?

December 29, 2018



1. The accuracy of the detectors is an important precondition for alarm when the toxic gas or flammable gas concentration reach the alarm point in the detection. Correct and timely is the guarantee of the personal and production safety.

2. The accuracy of the detectors depends on the sensors. While the electrochemical sensors used to measure toxic gases such as carbon monoxide and hydrogen sulfide are not worn out or consumed by exposure to CO or H2S, they still eventually need to be replaced when they are no longer able to detect gas. Although CO and H2S sensors may last for years without significant loss of sensitivity, the loss of sensitivity at the end of life may be sudden. Incidental exposure to other substances also may reduce sensitivity. For instance, many electrochemical sensors can be permanently affected by exposure to organic solvents and alcohols. Exposure to methanol is well known to affect the performance of CO and H2S sensors.

3. At moment, all the gas detectors haven’t been able to get rid of the relative measurements. Because of this, the device need timely maintenance and calibration. Only under the correct guidance of the manufactures, the accuracy of the test results can be guaranteed.

4. To guarantee the detection error is not exceeded in normal range, it’s necessary to do calibration frequently. Just like our watch, we will make calibration to ensure the time accuracy. Hence, the gas detectors accuracy is much more important when the detection results involve the safety of human life.
In a word, whether the device is used or not, or if it’s good use or not, it’s better to do calibration regularly to make sure the minimum results error and high accuracy
Therefore, we suggest to check the device with calibration gas before usage to make sure the gas detectors have the real protection function.