Thermocouple wire

Customers trust us to provide accurate and reliable platinum thermocouple wire for temperature measurement applications. We earned that trust by consistently supplying high quality wire and by investing in research and development to provide greater value.

We offer Type R, Type S and Type B platinum thermocouple wire in many diameters, as well as other special alloys or coatings. Our high purity, specially calibrated platinum wire is ideal for measurement of high temperatures by voltage generated at the junction of two dissimilar metals. All thermocouple wire is calibrated to special limits or standard grade in our accredited calibration laboratory, in line with international standards. 

Thermocouple wire
 Wire type Working temperature range (0C) ITS-90 tolerances IEC 584-2 tolerances
 type -leg  +leg  continuous  intermittent MIMS form standard limits  special limits class 1  class 2

 S

 Pt

 10%Rh/Pt

 200-1500

 200-1650

 200-1300

 +/-0.25%

 +/-0.1%

0 to +1100: ±1°C
+1100 to +1600: ±(1°C+0.003* (t°C-1100°C))°C

 0 to +600: ±1.5°C
+600 to +1600: ±0.25%

 R

 Pt

 13%Rh/Pt

 200-1500

 200-1650

 200-1300

 +/-0.25%

 +/-0.1%

0 to +1100: ±1°C
+1100 to +1600: ±(1°C+0.003*(t°C-1100°C))°C

 0 to +600: ±1.5°C
+600 to +1600: ±0.25%

 B

6%Rh/Pt

 30%Rh/Pt

 200-1600

 200-1750

 200-1450

 +/-0.5%

 +/-0.25%

 -

 +600 to +1700: ±0.25%

 

20%Rh/Pt

 40%Rh/Pt

 200-1700

 200-1850

 200-1450

 

 

 8

 

 

Ir

 40%Ir/Rh

 1000-2100

 -

 n/a

 

 

 10

 

 

0.03þ/Au

 Chromel

 1-300K

 -

 n/a

   

 

 

 

Do you need extra strong thermocouple wire? We're developed HTXTM platinum thermocouple wire for use in the most demanding applications.

Our thermocouple express ordering service provides a quick response and supply of the most common wire diameters for Type R, S and B thermocouples wire. Please contact us to request a quote for our wires shown below, or for other special requests.

Platinum thermocouple wire - common types
US part no.*   Type  Alloy  Diameter (")
19210  R/S  Pt  0.032
 17318  R/S  Pt  0.020
 18702  R/S  Pt  0.016
 18177  R/S  Pt  0.010
 19211  S  PtRh10  0.032
 17449  S  PtRh10  0.020
 19407  S  PtRh10  0.016
 18176  S  PtRh10  0.010
 19325  R  PtRh13  0.032
 17319  R  PtRh13  0.020
 18703  R  PtRh13  0.016
 18458  R  PtRh13  0.010
 19326  B  PtRh6  0.032
 17911  B  PtRh6  0.020
 32009  B  PtRh6  0.016
 33072  B  PtRh6  0.010
 19327  B  PtRh30  0.032
 17909  B  PtRh30  0.020
 32010  B  PtRh30  0.016
 33071  B  PtRh30  0.010

* Customers outside of the US, please give specifications when ordering.

Thermocouple temperature sensors using precious metal wire provides strong resistance to corrosion, thus guaranteeing long service life and reliable measurement accuracy.

Platinum thermocouple wire is the ideal technology for measuring high temperatures up to 1850°C.  Platinum and platinum-rhodium alloys withstand corrosive environments common in the glass, steel, oil & gas, and semiconductor industry. 

Industry Applications for platinum thermocouple wire. 
 Glass Temperature measurement in melting furnaces and casting processes in the glass manufacturing process.  
 Metals  Thermocouples measure temperature in electrically heated furnaces used during melting, casting and hardening process of various metals.
 Energy  Temperature measurement for oil and gas industries.
 Semiconductor  In-situ temperature measurement for diffusion furnaces, crystal growth and epitaxy process for semiconductor and solar wafer fabrication.
 Laboratories  Temperature measurement in calibration and analytical equipment, and small furnaces. 
 Crystal growth  Thermocouples for monitoring of furnaces used for crystal growth and semiconductor wafer production.

We also provide fine diameter calibrated wire for RTD’s, or resistance temperature detectors.  The wire is used as part of a device to accurately and quickly measure high temperatures. These devices can be constructed using various materials including platinum wire or film. RTD platinum wire is wrapped around a ceramic or glass core in a protective tube.  Platinum RTD wire provides long term stable measurement, the largest temperature range and a stable resistance vs temperature profile.

For superior reliability and durability in harsh temperature environments, we recommend  our high strength HTXTM platinum thermocouple wire.  HTX platinum wire is designed for the most demanding applications, such as semiconductor industry wafer processes.    

We also manufacture long length Mineral Insulated Metal Sheathed (MIMS) thermocouples in continuous lengths up to 18 meters.  MIMS platinum thermocouples provide faster response to temperature change and are resistant to chemical and atmospheric environments. 

Following our advice for storing your wire correctly will ensure its optimum performance. This will prevent any problems when using it, such as poor performance and breakages when using or removing the wire from the reel. The following tips will minimise any potential problems:

  • Store the reels in the cases supplied in the 'rolling position' to ensure the layers of wire do not tangle.
  • Store the wire on the reels it was supplied on, with any supporting bands remaining on the wire until it is used, and replaced if needed.
  • Store the wire at a constant temperature and do not subject it to extreme variations, as this will lead to thermal expansion, causing the wire to loosen and slip on the reel. If the wire is stored in a cold environment, we recommend the reels are brought to the working temperature at least 24 hours before use to allow the tension of the wire on the reel to adjust.
  • If a reel is part used, take care to ensure the end is correctly and securely tied off. Wire should never be tied up under another wrap of wire as this will cause tangling on future use.
  • Reels should not be stacked on each other; this avoids contact between the wire and the flange of another reel.
  • Store the reels in a clean environment, preferably in a dry atmosphere to prevent sticking during unwinding.

Full details with example images are available in several languages:

Get in touch

Jenn Gaudino

Jenn Gaudino

USA

  • +1 610 648 8079
Send a message
Les Hutton

Les Hutton

Rest of World

  • +44 (0) 1763 253348
Send a message