Usually display instruments, recording instruments, computer and other ancillary uses. Direct measurement of the production process in the range of 0 ºC -1300 ºC liquid, vapor, gas and solid surface temperature.
Explosion-proof thermocouple principle is the use of space, junction boxes and other components designed to have sufficient strength, all will produce sparks, arcs and dangerous temperature components are sealed in the junction box cavity, the cavity when the explosion occurred, through flame and cooling joints gap, so after the explosion of flame and temperature does not reach the outer chamber, thereby performing explosion.
1,A variety of forms of proof, explosion-proof performance
2,Compression spring-type temperature sensing element, seismic performance
3,Large measuring range
4,High mechanical strength, good pressure resistance
The main technical parameters
Product performance standards
Measuring range and tolerance
|Type|| No indexing|| Tolerance level|
| I|| II|
| Tolerance value|| Measuring range ºC|| olerance value|| Measuring range ºC|
| WRN|| K|| ±1.5ºC|| -40?375||±2.5ºC|| -40?333|
| ±0.004ItI|| 375?1000|| ±0.0075ItI|| 333?1200|
| WRM|| N|| ±1.5ºC|| -40?375|| ±2.5ºC|| -40?333|
| ±0.004ItI||375?1000|| ±0.0075ItI|| 333?1000|
| WRE|| E|| ±1.5ºC|| -40?375|| ±2.5ºC|| -40?333|
| ±0.004ItI|| 375?800|| ±0.004ItI|| 333?900|
| WRF|| J|| ±1.5ºC|| -40?375|| ±2.5ºC|| -40?333|
| ±0.004ItI|| 375?750|| ±0.004ItI|| 333?750|
| WRC|| T|| ±0.5ºC|| -40?125|| ±1ºC|| -40?133|
| ±0.004ItI|| 125?350|| ±0.0075ItI|| 133?350|
Temperature insulation resistance
Armored even at an ambient temperature of 20 ± 15 ºC, relative humidity less than 80%, the test voltage is 500 ± 50V (DC) insulation resistance between the electrode and the jacket pipe ≥1000MΩ.m.
That is 1m long insulation resistance of the sample is 1000MΩ.
10m long insulation resistance of the sample is 100MΩ.
Explosion proof grade thermocouple their use in explosive gas mixture into a maximum security clearance A, B, C, three
|Category||Level||The maximum experimental safe gap(MESG)MM|
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