Thermocouple Extension & Compensating Cable

Thermocouple extension and compensating cables are designed to transmit the thermoelectric signal between a thermocouple and the connected instrument while maintaining the required thermoelectric characteristics.

• Extension Grade (-X): Uses conductor materials corresponding to the thermocouple type.
• Compensating Grade (-C): Uses alternative alloys with matching thermoelectric characteristics within the specified temperature range.

Product Features

• Multiple thermocouple types: K, N, E, J, T, S, R, and B options are available.
• Flexible insulation: PVC, silicone rubber, PTFE/FEP, and fiberglass options are available.
• Shielded options: Aluminum foil or tinned-copper braid can be supplied for applications requiring additional electrical noise protection.
• Solid or stranded conductors: Select the construction according to installation flexibility and mechanical requirements.
• IEC 60584-3 specifications: Cable identification and tolerance requirements can be supplied according to applicable specifications.
• Custom supply: Available by roll, meter, or custom cut length.

Main Applications

Thermocouple extension and compensating cables are commonly used for:

• Industrial furnaces and kilns
• Chemical and petrochemical equipment
• Metallurgy and power systems
• Laboratory temperature equipment
• Process automation and temperature monitoring
• Industrial heating and temperature control systems

Supported Thermocouple Types

For help comparing K, J, T, E, N, S, R, and B thermocouple options, see our thermocouple selection guide.

Note: Cable designations and available constructions may vary according to the applicable standard, thermocouple type, and manufacturer specification.

Insulation & Sheath Options

Note: The temperatures above refer to the typical service range of the insulation system, not the measuring temperature range of the connected thermocouple. Actual cable limits depend on conductor, insulation construction, ambient conditions, and installation.

Conductor & Shield Options

• Solid conductor: Suitable for fixed installations.
• Stranded conductor: Provides greater flexibility for moving or frequently handled wiring. Common constructions include 7/0.2 mm and 7/0.3 mm.
• Unshielded: Suitable for general wiring environments.
• Aluminum foil shield: Provides additional protection against electrical interference.
• Tinned-copper braided shield: Suitable for applications with stronger electromagnetic interference.

Selection & Installation Notes

1. Select the cable according to the exact thermocouple type and required cable grade.
2. Match the positive and negative polarity correctly during installation.
3. Select insulation according to ambient temperature, moisture, chemicals, and mechanical conditions.
4. Use Extension-X cable when the cable is exposed to higher ambient temperatures near the sensor.
5. Compensating-C cable should be installed only within its specified ambient temperature range.
6. Use suitable shielding and grounding practices when electrical interference is a concern.
7. Fiberglass braided cable is generally intended for dry high-temperature environments and should be protected from direct water and oil exposure.

Custom Supply Options

• Cable type: K, N, E, J, T, S, R, or B
• Cable grade: Extension-X or applicable compensating grade
• Conductor: Solid or stranded
• Insulation: PVC, silicone, PTFE/FEP, fiberglass, or other specified construction
• Shielding: Unshielded, foil, or copper braid
• Length: Standard roll or custom cut length

Related Thermocouple Products

• Industrial Thermocouples
• Sheathed Thermocouple
• Wear-Resistant Assembly Thermocouple
• Platinum-Rhodium Assembly Thermocouple
• Waterproof Anti-Corrosion Assembly Thermocouple
• Thermocouple Applications

Request OEM Thermocouple Cable Support

For OEM or replacement requirements, please provide the thermocouple type, cable grade, conductor construction, insulation material, shielding option, required length, and application environment. Drawings, photos, and existing cable samples are welcome.

Custom thermocouple wire and extension cables are available for OEM, industrial temperature measurement, and replacement applications.