Type R Thermocouples and Type S Thermocouples

Type R and Type S Thermocouple Manufacture

We manufacture type R and S thermocouples to your specifications or as replacements to existing sensors. We have manufactured thermocouples for over 25 years and are solely focused on the design and manufacture of temperature sensors. Please call or email us to discuss your requirements.

Need some help?

If you are unsure exactly what you need, get in touch and we can help identify your requirements.

Type R and S Thermocouple Designs

Thermocouples can come in a variety of designs suited to different applications. View the details of each type of design we offer for Type R & S.

Thermocouple Type R and Type S Technical Details

Type S and R type thermocouples are the most popular rare metal thermocouple types. They are very similar in conductor construction. The main difference is that Type R is more popular in the UK whereas Type S is more popular in Europe. As the cost of Platinum and Rhodium is high in comparison to base metal thermocouples, Type S and Type R thermocouple wire can be recovered and recycled from failed thermocouples. The negative leg on a Type R or Type S thermocouple is pure Platinum and the positive leg is Platinum/Rhodium

Type R & Type S Thermocouple Temperature Range


Type R: 0 to +1600°C

Type S: 0 to +1600°C

Short Term:

Type R: -50 to +1700°C

Type S: -50 to +1700°C

Type R & Type S Thermocouple Material

Type R:

Platinum/Rhodium (87%Pt, 13%Rh) (+ Positive Leg)

Platinum (100%Pt) (- Negative Leg)

Type S:

Platinum/Rhodium (90%Pt, 10%Rh) (+ Positive Leg)

Platinum (100%Pt) (- Negative Leg)

Type R & Type S Thermocouple Tolerance Details

Tolerance Class 1

0 to +1100 ± 1.0°C

1100 to 1600 ± (1+0.003 (t-1100))*[t]°C

Tolerance Class 2

0 to +600 ± 1.5 °C

600 to 1600 ± 0.0025*[t]°C

Type R & Type S Thermocouple Colour Codes

IEC Colour Code

Type R/S IEC Cable Colour Coding

BS Colour Code

Type R/S BS Cable Colour Coding

ANSI Colour Code

Type R/S ANSI Cable Colour Coding

Contact us

We’ve made Type R and Type S Thermocouples for over 25 years and today we are considered the best choice for custom built temperature sensors in the UK. We continue to apply our expertise and invest in the latest technology to provide our customers with the highest quality temperature sensors available.

Contact us with your requirements if you have an existing sensor design or are unsure what you need we’ll be able to find you get the right sensor for your process.

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