What are the misunderstandings in the use of gas detectors, and what are the precautions
Gas detector is a kind of instrumentation tool for gas leakage concentration detection, including: portable gas detector, hand-held gas detector, fixed gas detector, online gas detector, etc. The type of gas present, the gas sensor is a sensor used to detect the composition and content of the gas. In the course of use, the reason why the gas detector cannot be used or damaged is that the quality factor is only part of the selection of ordinary manufacturers, most of which are caused by improper selection and improper use. So do you know what are the misunderstandings in the use of gas detectors?
What are the misunderstandings and precautions of the gas detector
Misunderstandings in the use of gas detectors:
Acceptance error: Test with high concentration gas: After the customer installs the combustible gas detector on site, use a lighter to test whether the detector works normally. After a ventilation test, the detector alarms but cannot be reset to zero. In normal use, after detecting sensor damage, all return to the factory to pay for replacement.
Analysis: Many customers like to use high concentration gas for testing during acceptance. This method is very inaccurate and can easily cause damage to the instrument. The detection range of the combustible gas detector is 0~100% LEL, the lower explosion limit is low (methane is 0~5% vol), and the lighter gas is high-purity butane, which is far beyond the detection range.
Test Errors: When testing with lighter gases, the sensor will be hit 2 to 3 times or more, and the chemical activity of the sensing element will decay or deactivate prematurely, resulting in reduced detection. The platinum wire was blown and the sensor was scrapped. It should be noted that sensor failures caused by high-concentration gas shock cannot be guaranteed by the manufacturer and will need to be replaced at their own expense.
Analysis: Most of the combustible gas detectors on the market use the principle of catalytic combustion. The principle of catalytic combustion is to use catalytic energy to generate low-temperature flameless combustion on the catalytic element, and the combustion heat increases the temperature of the element.
