Brief Description

The WRR2-121 assembly thermocouple is used as asensor to measure temperature, usually matched with display instruments,recording meter and electronic regulator. It can directly measure temperaturefrom 0oC to 1800oC of liquid, vapor, gas medium and solidsurface during various 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 WRR2-121 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  

Specifications

Thermocouple type   Model   Graduation   Temp  range℃   Specs   Response time T0.5S  

Dia mm   Protection casingmaterial  

Simplex PtRh30-PtRh6   WRR-120      B      0~1600    Φ16       corundum    <150  

WRR-121    Φ25    <360  

Duplex PtRh30-PtRh6    WRR2-120    Φ16    <150  

WRR2-121    Φ25    <360  

SimplexPtRh10-Pt    WRP-120       S     0~1300    Φ16    High  aluminum    <150  

WRP-121    Φ25    <360  

Duplex PtRh10-Pt    WRP2-120    Φ16    <150  

WRP2-121    Φ25    <360  

Simplex PtRh30-PtRh6    WRR-130       B       0~1600    Φ16       corundum    <150  

WRR-131    Φ25    <360  

Duplex PtRh30-PtRh6   WRR2-130   Φ16    <150  

WRR2-131    Φ25    <360  

SimplexPtRh10-Pt   WRP-130     S﹡    0~1300    Φ16    High aluminum    <150  

WRP-131    Φ25    <360  

Duplex PtRh10-Pt    WRP2-130    Φ16    <150  

WRP2-131    Φ25   <360  

Thermocouple type   Model   Graduation   Temp  range℃   Specs   Response time T0.5S  

Dia mm   Protection casingmaterial  

Simplex PtRh30-PtRh6   WRR-120      B      0~1600    Φ16       corundum    <150  

WRR-121    Φ25    <360  

Duplex PtRh30-PtRh6    WRR2-120    Φ16    <150  

WRR2-121    Φ25    <360  

SimplexPtRh10-Pt    WRP-120       S     0~1300    Φ16    High aluminum    <150  

WRP-121    Φ25    <360  

Duplex PtRh10-Pt    WRP2-120    Φ16    <150  

WRP2-121    Φ25    <360  

Simplex NiCr-NiSi    WRN-122      K    0~1100    Φ16     High aluminum    <240  

WRN-123    0~1200    Φ20  

Duplex NiCr-NiSi    WRN2-123    0~1100  

Simplex PtRh30-PtRh6    WRR-130       B       0~1600    Φ16       corundum    <150  

WRR-131    Φ25    <360  

Duplex PtRh30-PtRh6   WRR2-130   Φ16    <150  

WRR2-131    Φ25    <360  

SimplexPtRh10-Pt   WRP-130     S﹡    0~1300    Φ16    High aluminum    <150  

WRP-131    Φ25    <360  

Duplex PtRh10-Pt    WRP2-130    Φ16    <150  

WRP2-131    Φ25   <360  

Simplex NiCr-NiSi    WRN-133    K    0~1200    Φ30    High aluminum    <240  

Duplex NiCr-NiSi    WRN2-133    0~1100  

Note: For special requirement of the WRR2-121 thermocouple, please contact the manufacturer.