Explosion-proof Thermocouple

Application
It is usually connected with display meter, recording meter and computer, etc. to directly measure temperature of liquid, vapor, gas and solid surface ranging from 0℃ to 1300℃ with explosives such as hydrocarbon on production spot.

Features
Various explosion-proof types, good explosion-proof performance
Spring thermal element with good shock-proof performance
Wide measuring range
High mechanical strength, good pressure-resistant performance

Operation Theory
Explosion-proof thermocouple has a junction box of enough strength with gaps inside it. All spare parts which might produce spark, electric arc, and dangerous high temperature are sealed in the junction box. When explosion within the box happens, fire and high temperature caused by explosion could be extincted and cooled with the gap. Thus, explosion separation could be realized.
 
Main Technical Parameters
Executive Standard
IEC584
GB/T16839-1997
JB/T5518-1991
GB3836
 
Insulation Resistance at Normal Temperature
The insulation resistance between electrode and protection tube of the thermocouple shall be no less than 1000MΩ m under condition that environment temperature is 20±15℃，relative humidity is more than 80%, and testing voltage is D.C.500V ±50V.
 

Certificates List 

Remarks: NEPSI National Explosion-Proof Security Inspection 
 
 
Measuring Range & Tolerance

 

 
Indication of Explosion-proof Function 
 

 
Electric Equipment Category
 
I –Electric Equipment for Coal Mine Well 
II –Electric Equipment for Plant
 
 
 
Explosion-proof Class
It is divided into Class A, B, and C according to maximum test safety gap in explosive gas compound.
 

 
Temperature Group
It includes T1-T6 according to maximum surface temperature allowed of open part.

 
Explosion-proof Class
EXd II □ T □
EXia II □T □
 
Protection Class
IP65
Junction Box 
 
 
Terminal
 
 
 
Type Naming Method