Take you to understand the explosion-proof gas detector knowledge point
Nowadays, many industrial places will require the use of explosion-proof gas detectors, so what is the explosion-proof level of gas detectors?
It is able to resist the impact of the explosion and heat without loss, can still work normally called "explosion-proof gas detector", also known as explosion-proof gas detector.
1. Explosion-proof mark (EX)
Explosion-proof gas detector identification parameters are usually marked with EX icon, this letter means that the device is explosion-proof electrical equipment.
2.Explosion-proof level
Explosion-proof gas detector explosion-proof level - divided into A, B, C three levels, indicating the strength of its explosion-proof ability, common widely used is the most C level.
3.Explosion-proof structure
The explosion-proof structure of the gas detector refers to the measures adopted by the device for explosion-proof. Its identification parameters are usually d for explosion-proof, i for intrinsically safe, p for positive pressure.
4. Explosion-proof equipment
Gas detector according to the type of explosion-proof equipment is currently distinguished between two types, type II for the factory electrical equipment, type I for the coal mine underground electrical equipment.
5.Temperature level
Gas detector for the temperature level (temperature maximum tolerance value) is divided into T1, T2.... T6 six groups, the smaller the number of the suffix, the identification of the maximum surface temperature of the device allows.
Gas detector selection principles
1, according to the results of the gas explosion hazardous places to choose the explosion-proof instrumentation explosion-proof type.
2, according to the gas explosion hazardous places may appear in the explosion of explosive gases and vapours of the explosion level selection of explosion-proof instrumentation explosion-proof level; 3, according to the gas explosion hazardous places in the explosion level selection of explosion-proof instrumentation.
3, according to the gas explosion hazardous areas of explosive gases and vapours may appear in the spontaneous combustion temperature selection of explosion-proof instrumentation temperature group.
