What are the usage errors and precautions of gas detectors
Gas detector is an instrument tool for detecting gas leakage concentration, which includes portable gas detectors, handheld gas detectors, fixed gas detectors, online gas detectors, etc. It mainly uses gas sensors to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases. In the process of use, the reason why the gas detector cannot be used or damaged is that quality factors are only a part of choosing ordinary manufacturers, most of which are caused by improper selection and use.
Misunderstandings in using gas detectors:
Acceptance error: Testing with high concentration gas: After installing the combustible gas detector on site, the customer used a lighter to test whether the detector was working properly. After the ventilation test, the detector alarms but cannot be reset to zero. Normal use, upon detecting sensor damage, all items will be returned to the factory to pay for replacement.
Analysis: Many customers prefer to use high concentration gases 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, with a lower explosive limit (methane is 0-5% vol). The lighter gas is high-purity butane, which far exceeds the detection range.
Test error: When using lighter gases for testing, the sensor will be subjected to 2 to 3 or higher impacts, and the chemical activity of the sensing element will decay or stop prematurely, resulting in reduced detection. The platinum wire was burned and the sensor was scrapped. It should be noted that manufacturers cannot guarantee sensor failures caused by high concentration gas shocks and will need to replace them at their own expense.
Analysis: Most 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 catalytic components, and the heat of combustion increases the temperature of the components.
