Explosion Proof Thermocouple (Competitive Price Around China)
Application:
It is usually cooperated with display instrument, recording instrument and computer etc. It can measure temperature of liquid, vapor and solid surface ranging from -40ºC to +1300ºC during production processes directly.
Feature:
1. Multi explosion proof type, good explosion proof performance.
2. Spring thermal element with good shock resistant performance.
3. Wide measuring range.
4. High mechanical strength and good pressure resistant performance.
Working Principle:
Explosion proof thermocouple is making use the clearance principle to design the connection box and other components with enough strength, and then seal all components which has dangers as fire, arc, and dangerous temperature in the connection box. When an explosion occurs in the cavity, it can be extinguished and cooled by the gap of the joint surface, so that the flame and temperature after the explosion are not transmitted to the outside of the cavity, thereby performing temperature measurement.
Measuring Range & Tolerance:
| Type |
Thermal Elements |
Tolerance Class |
| 1 |
2 |
| Tolerance Value |
Measureing RangeºC |
Tolerance Value |
Measuring RangeºC |
| WRN |
NiCr-NiSi |
±1.5ºC |
-40~+375 |
±2.5ºC |
-40~+333 |
| ±0.004 |t| |
375~1000 |
±0.0075|t| |
333~1200 |
| WRM |
NiCrSi-NiSi |
±1.5ºC |
-40~+375 |
±2.5ºC |
-40~+333 |
| ±0.004 |t| |
375~1000 |
±0.0075|t| |
333~1200 |
| WRE |
NiCr-CuNi |
±1.5ºC |
-40~+375 |
±2.5ºC |
-40~+333 |
| ±0.004 |t| |
375~800 |
±0.0075|t| |
333~900 |
| WRF |
Fe-CuNi |
±1.5ºC |
-40~+375 |
±2.5ºC |
-40~+333 |
| ±0.004 |t| |
375~750 |
±0.0075|t| |
333~750 |
| WRC |
Cu-CuNi |
±0.5ºC |
-40~+125 |
±1ºC |
-40~+133 |
| ±0.004 |t| |
125~350 |
±0.0075|t| |
133~350 |
Explosion Proof Class
| Type |
class |
Maximum Test Safety Gap(mm) |
| || |
A |
≥0.9 |
| B |
0.5<Gap<0.9 |
| C |
≤0.5 |
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