Brief Description

The WRN2-120 assembly thermocouple is used as a sensor tomeasure temperature, usually matched with display instruments, recording meterand electronic regulator. It can directly measure temperature from 0oCto 1800oC of liquid, vapor, gas medium and solid surface duringvarious production processes.

Since 1987,according to the national regulations, our factory have been producing thermocouplemade from PtRh30-PtRh6, PtRh10, NiCr-NiSi, NiCr-CuNi, Cu-CuNi, Fe-CuNi etc underthe IEC international standard index numbers, and JB/T9238-1 999 standard aswell.

Category   Model   Graduation   Range   Allowable error(△t℃)  

Platinum rhodium30-Platinum rhodium6   WRR   B   0-1800   ±1.5℃ or ±0.0025∣t∣  

Platinum rhodium10-platinum   WRP   S   0-1600   ±1.5℃ or ±0.0025∣t∣  

Nickel chromium-nickel silicon   WRN   K   0-1300   ±2.5℃  or ±0.0075∣t∣  

Nickel chromium-copper nickel   WRE   E   0-800   ±2.5℃ or ±0.0075∣t∣  

Model of WRN2-120 assembly thermocouple

W    Temperature  meter  

R   Thermocouple    

□thermocouple material   R) Platinum  rhodium30-Platinum rhodium6  

P) Platinum  rhodium10-platinum    

N) Nickel  chromium-nickel silicon  

E) Nickel  chromium-copper nickel  

□ install and fixed type   1) without  fixed device    

2)fixed thread  type  

3)movable  flange type    

4)fixed  flange type  

5)movable  flange with square tube type  

6) fixed  thread with tapered tube type  

□ junction box type    2)splash  proof type    

3)waterproof  type  

4)explosion-proof  type  

□ design series number    0)ø16mm protecting tube    

1)ø25mm protecting tube(double  tubes)    

2)ø16mm high aluminum  tube(single tube)    

3)ø20mm high aluminum tube    

Upper and lower limits of thermocouple and insulatingresistance:

Upper  temperature limit(tm℃)   Test  temperature(T℃ )   Resistance(MΩ)  

100≤tm＜300   t=tm   10  

300≤tm＜500   t=tm   2  

500≤tm＜850   t=tm   0.5  

850≤tm＜1000   t=tm   0.08  

1000≤tm＜1300   t=tm   0.02  

tm＞1300   t=1300   0.02  

Thermocouple without fixed device

Thermocouple    Model   Graduation   Temp range℃   Protection tube material   Specs   Junction box type  

Total length L mm  

Simplex NiCr-NiSi   WRN-120   K   0~800 0~1000   1Cr18Ni9Ti 1Cr25Ni20#   300350400450550650900115016502150   Splash-proof type  

Duplex Nicr-NiSi   WRN2-120  

Single NiCr-CuNi   WRE-120   E   0~600   1Cr18Ni9Ti  

Duplex NiCr-CuNi   WRE2-120  

Simplex NiCr-NiSi   WRN-130   K   0~8000~1000   1Cr18Ni9Ti1Cr25Ni20#   Water-proof type  

Duplex NiCr-NiSi   WRN2-130  

Simplex NiCr-CuNi   WRE-130   E   0~600   1Cr18Ni9Ti  

Duplex NiCr-CuNi   WRE2-130  

Note  1) Thermal-responsetime-T0.5<90seconds

2)  “#” means there has nosuch type material

Note: For specialrequirement of the WRN2-120 thermocouple, please contact themanufacturer.