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Mineral Insulated Thermocouples

What is a Mineral Insulated Thermocouple?

A mineral insulated (MI) thermocouple consists of conductors embedded in highly compacted magnesium oxide inside a metal sheath. This design offers excellent durability, flexibility, and temperature resistance.

TC specialises in the manufacture and supply of thermocouples and has been trusted by manufacturers, OEMs, and research labs across the UK and internationally for over 50 years.

Whether you need standard or custom-built temperature sensors for industrial, scientific, or OEM applications, our expert UK-based engineers are ready to assist, from initial enquiry through to delivery.

with Basic End Seal
0.25 to 10.8mm dia.

Internal seal with bare conductors with Pot Seal
0.25 to 10.8mm dia.

a large selection of plain and threaded pot seals supplied with tails or extension cable (PVC, FEP, Fibreglass etc.) with Miniature Plug
0.25 to 3.2mm dia.

fitted with a miniature thermocouple plug rated to either 220ºC, 300ºC, 425ºC or 600ºC with Miniature Socket
0.25 to 3.2mm dia.

fitted with a miniature thermocouple socket rated to either 220ºC, 300ºC, 425ºC or 600ºC with Standard Plug
1.5 to 8.0mm dia.

fitted with a standard thermocouple plug rated to either 220ºC, 300ºC, 425ºC or 600ºC with Standard Socket
1.5 to 8.0mm dia.

fitted with a standard thermocouple socket rated to either 220ºC, 300ºC, 425ºC or 600ºC with Lemo Connector
3.0 to 6.0mm dia.

fitted with a size 1 Lemo plug
or socket with Terminal Entry Gland
1.0 to 8.0mm dia.

terminated with a 16mm ISO x 1.5mm compression gland seal supplied with tails or extension cable (PVC, FEP Fibreglass etc.) with Micro die cast alloy head 3.0 to 6.0mm dia.

Micro die cast alloy screw down terminal head with ceramic terminal block. Suitable for simplex and duplex assemblies with Miniature IP67 die cast head 3.0 to 8.0mm dia.

Weatherproof die cast alloy screw top terminal head with ceramic terminal block. Suitable for simplex and duplex assemblies with Standard IP67 die cast head 4.5 to 10.8mm dia.

Weatherproof die cast alloy screw top terminal head with ceramic terminal block. Suitable for simplex, duplex and triplex assemblies with IP67 heavy duty cast iron head 4.5 to 10.8mm dia.

Weatherproof cast iron screw top terminal head with ceramic terminal block. Suitable for simplex, duplex and triplex assemblies with IP67 Bakelite head
4.5 to 10.8mm dia.

Weatherproof Bakelite screw top terminal head with Bakelite terminal block. Suitable for simplex, duplex and triplex assemblies with alloy straight through head 4.5 to 10.8mm dia.

Die cast alloy straight through terminal head with Bakelite terminal block. Suitable for simplex and duplex assemblies with 316 Stainless Steel head 4.5 to 10.8mm dia.

Weatherproof 316 stainless steel screw top terminal head with ceramic terminal block. Suitable for simplex and duplex assemblies with BUZ-H style top hat head 4.5 to 10.8mm dia.

Weatherproof die cast alloy screw down 'flip' terminal head. Mainly used for duplex assemblies where two transmitters can be fitted with spring loaded terminal block 3, 4.5, 6 and 8mm dia.

Spring loaded insert assemblies. The end seal is incorporated into a terminal block for mounting into any standard terminal head