Rare Metal High Temperature Thermocouples

Special Options

All our platinum thermocouples are custom-made, as such, we are able to tailor your sensors exactly to your requirements. There are many options available including:

Special materials

Materials which would work best in your process are available on request.

Pressure testing/tight

Pressure testing can be conducted and pressure tight designs are available.

Special coatings

Wear and chemical resistant coatings can be applied to sensors e.g. ACT™.

Lining sheaths

Ceramic lining sheaths can be added to increase heat resistance.


Full UKAS or UKAS traceable calibration is available. AMS 2750 F to full or traceable calibration is available.

Process Fittings

Flange or compression fittings can be added such as an adjustable or welded flange on shank

Material Certificates

Material certificates are available on request.

Duplex & Triplex

Thermocouples can be supply duplex or triplex instead of simplex.


High temperature compensating cable can be supplied fitted to sensor.

Reduced tip options

Reduced hot junction for fast response or cost saving.

Rare Metal High Temperature Thermocouple Types

There are three types of rare metal thermocouple all made from alloys of platinum and rhodium with slightly different characteristics and specifications.

Type R & Type S Thermocouple

UK and European Standard.

Type B Thermocouple

Very high max temperature.

UK Manufactured Rare Metal Thermocouples

Rare Metal thermocouples are made from conductors containing platinum and rhodium alloys and are suited for measuring high temperatures up to +1700°C. They are a rugged design, suited for tough industrial use. We manufacture and design rare metal thermocouple assemblies. Please see our designs below.

Need some help?

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

Rare Metal High Temperature Thermocouples Designs

The rare metal sensor will need contamination protection from the process it is measuring. Each thermocouple should have a protection sheath best suited to its application.

Contact us

We’ve made rare metal 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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