Brief Description

The WRN-420A 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 WRN-420A 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(duplex tubes)    

2)ø16mm high aluminum tube(simplex  tube)    

3)ø20mm high aluminum tube    

Fixed flange type thermocouples

Thermocouple   Model   Graduation   Temperaturemeasuring range℃   Protection tube material   Specification   Junction box    

Overalllengthmm   Depth mm  

Simplex nickel chrome-nickel silicon   WRN-420     K   0-8000-1000   SS1Cr18Ni9TiSS＃1Cr25Ni20   300350400450550650900115016502150   150200250300400500750100015002000   Splash-proof  

WRN-420A  

Duplex nickel chrome-nickel silicon   WRN2-420  

Simplex nickel chrome-copper nickel   WRE-420     E   0-600   StainlessSteel1Crl8Ni9Ti  

WRE-420A  

Duplex nickel chrome-copper nickel   WRE2-420  

Simplex nickel chrome-nickel silicon   WRN-430   K   0-8000-1000   Stainless Steel1Cr18Ni9TiStainless Steel＃1Cr25Ni20   Water proof type  

Duplex nickel chrome-nickel silicon   WRN2-430  

Simplex nickel chrome-copper nickel   WRE-430   E   0-600   StainlessSteel1Crl8Ni9Ti  

Duplex nickelchrome-copper nickel   WRE2-430  

Notes: 1) Thermal response time, τ0.5<90S

2) On the  materialof protecting tube marked “＃”means no this material.

3) Nominal pressure: 2.5Mpa．

Model and specifications

Model   Flange specifications (professional standard)  

D0   D1   D2   H  

WRN-420   Φ95   Φ65   Φ45   15  

WRN-420A   Φ95   Φ70   Φ36   10  

WRN2-420   Φ95   Φ65   Φ45   15  

WRE-420   Φ95   Φ65   Φ45   15  

WRE-420A   Φ95   Φ70   Φ36   10  

WRE2-420   Φ95   Φ65   Φ45   15  

WRN-430   Φ95   Φ65   Φ45   15  

WRN2-430   Φ95   Φ65   Φ45   15  

WRE-430   Φ95   Φ65   Φ45   15  

WRE2-430   Φ95   Φ65   Φ45   15  

Note: For special requirement of the WRN-420A thermocouple, pleasecontact the manufacturer.