Mineral Insulated Thermocouples

UK Manufactured Mineral Insulated Thermocouples

We manufacture and design mineral insulated thermocouples. Mineral insulated thermocouples consist of an outer metal sheath which protects the thermocouple elements from damage and contamination, this sheath is malleable so mineral insulated thermocouples can be easily bent and formed into a variety of shapes to suit your application. The inner thermocouple elements are insulated with magnesium oxide powder, tightly packed so no air is trapped inside,  this provides great thermal conductivity.

Wide variety in designs and uses

MI Thermocouples are very tough and can withstand up to 1250°C (depending on design and thermocouple type) making them perfect for a wide variety of industrial uses such as ovens, kilns and furnaces.

There are a wide range of options for our MI thermocouples. They can be constructed with various diameters and materials of sheath, many different thermocouple types and with our laser welder, mineral insulated thermocouple lengths are practically limitless.

Mineral Insulated Thermocouple Designs

Select the appropriate design below to view full specifications. Everything can be tailored to your exact needs and requirements.

Common designs include:

We can make thermocouples from existing designs, drawings, photos or specifications.

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

MI Thermocouple with Pot Seal & Flexible Tails

A very common robust sensor with a wide range of applications. Also known as “bare leads” thermocouple.

MI-TC-with-Pot-Seal

Mineral Insulated Thermocouple Insert with Block

This standard design can be altered in accordance with IP65 and is very suitable for insertion into a pocket.

MTI

Mineral Insulated Thermocouple with Standard Plug

The standard plug enables the temperature sensor to be easily connected and disconnected to a variety of controllers and readouts in busy and demanding environments.

Mineral Insulated Thermocouple with Miniature Plug

The miniature plug enables the temperature sensor to be easily connected to a variety of hand held instruments and read outs.

MTM

Mineral Insulated Thermocouple with Head

This standard design can be altered in accordance with IP65 and is very suitable for insertion into a pocket.

MTH

MI Thermocouple with Permanently Attached Cable

This is a variation on the MI Thermocouple with Pot Seal & Tails. It comes with a longer cable and is often used in original equipment manufacture.

MTA

Mineral Insulated Thermocouple With Transmitter

This design is suitable for insertion into an existing thermowell assembly.

Mineral Insulated Thermocouple Insert with DIN Plate

This standard design can be altered in accordance with IP65 and is very suitable for insertion into a pocket.

Mineral Insulated Thermocouple with Basic Seal

This standard design can be altered in accordance with IP65 and is very suitable for insertion into a pocket.

Special Options

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

  • Special materials

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

  • Calibration

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

  • Material Certificates

    Material certificates are available on request.

  • High Temperature Versions

    High temperature options for plugs, sockets and cable can be supplied.

  • Thermocouple Junction

    Thermocouple junctions can be insulated, exposed or grounded depending on what’s suitable for your application.

  • Process Fittings

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

  • Duplex & Triplex

    Thermocouples can be supplied duplex or triplex instead of simplex.

  • Reduced tip options

    Reduced hot junction for fast response or cost saving.

  • Tagging

    Your own serial, product number or other information attached to sensors via heat shrink cable or metal tags.

  • Bent to shape

    MI thermocouples can be bent to any shape to fit your process or application.

Contact us

We’ve made mineral insulated thermocouples for 20 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.