Common sense in daily life of gas detector
Gas detector is an instrumentation tool for detecting gas leakage concentration. Generally, there are three types: handheld diffusion type, pump suction type and fixed online type. It mainly uses gas sensors to detect the types of gases existing in the environment. Gas sensors are used To detect the composition and content of the sensing device of the gas, then the common sense in the daily life of the gas detector?
1. What gases are included in the standard 4-in-1?
Some people don't know which gases and the detection range of the four-in-one gas detector are often said. Simply put, the four gases in the four-in-one are: flammable EX0-100% LEL, carbon monoxide 0-1000PPM, oxygen 0 -30% VOL, hydrogen sulfide 0-100PPM.
For example, Handa Electronics has two four-in-one gas detectors, namely the pump suction type and the diffusion type. Compared with the two detectors, the pump suction four-in-one gas detection effect is faster and more accurate. The corresponding pump suction price It is also slightly higher than the diffusion type;
Second, the difference between diffusion and pump suction?
Gas detectors know that there are two most common detection methods, one is the natural diffusion type and the other is the pump suction type, but I don’t know what the difference between the two is. The natural diffusion type is slow without applying any external force. The gas is sensed, and the pump-suction type uses a self-priming pump to inhale independently.
For example, the human nose responds faster, so when choosing, you must look at the detection method in order to effectively detect the gas;
3. Oxygen reverse measurement of nitrogen Oxygen and nitrogen common gases?
The main components in the air are oxygen and nitrogen, content: the oxygen content is 20.95%, and the nitrogen content is 78.09%. Due to the relatively high price of nitrogen-specific sensors, some people will choose to use oxygen sensors to measure nitrogen back, which is actually possible, that is, use 100 Subtracting the oxygen content value is the oxygen content value;
4. Is the gas detector explosion-proof?
The gas detector depends on whether it has reached the explosion-proof grade. The general explosion-proof grades of the detector are BT3, BT4, CT3, CT6, etc., so when we buy the detector, we only need to look at these explosion-proof grades.
The gas detector can detect hydrogen sulfide, carbon monoxide, oxygen, sulfur dioxide, phosphine, ammonia, nitrogen dioxide, hydrogen cyanide, chlorine, chlorine dioxide, ozone and combustible gases and other gases, widely used in petrochemical, coal On-site detection in various places such as metallurgy, chemical industry, municipal gas, and environmental monitoring can meet the measurement needs of special occasions; it can detect gas concentration or leak detection in tunnels, pipelines, tanks, and confined spaces.
