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Thermocouples

Thermocouples for temperature measurement up to 1,700 °C

Thermocouples are temperature sensors that generate a voltage directly dependent on temperature. Compared to resistance thermometers, they are particularly suited for high temperatures up to 1,700 °C. Instrument designs from mineral-insulated sheathed cable are very resistant against extremely high vibration loads (depending on instrument model, sensor element and wetted materials). The accuracy classes 1 and 2 apply for thermocouples in accordance with IEC 60584 as well as the standard and special classes in accordance with ASTM E230.

What is a thermocouple, including thermowell?

A thermowell keeps aggressive substances and other harmful influences away from the temperature probe itself. Operating personnel and the environment are thus protected. Thermowell variants are available with flanges, threaded or for welding in. With high-temperature sensors, the thermoelectric wires of the thermocouple are built into the thermowell. Thus, extremely high temperatures can be measured. Instruments for flue-gas temperature measurement are suitable for temperature measurement in gaseous media in the low-pressure range (up to approx. 1 bar).

What is a thermocouple for installation in a thermowell?

These thermocouples can be combined with a variety of thermowell designs. Through the individual assembly of connection head, sensor, insertion length, etc., you can have a thermometer suited to each thermowell dimension and each application.

What is a thermocouple for direct installation in the process?

These instruments are always used when a temperature measurement is to be made directly in the process. The thermometers without thermowells are suitable for all applications without chemically aggressive media and without abrasion.

Thermocouples with surface probe

For surface temperature measurement, you will find thermocouples with surface probes in the WIKA range. Various designs enable measurements on flat surfaces - including inside combustion furnaces and on pipes in industrial and laboratory applications. These temperature sensors can also be used directly in drilled holes.

Thermocouples for the plastics industry

These hot runner thermocouples have been specifically constructed for this application in the plastics industry. They are suitable for measuring tasks where they are press-fitted into a grooved channel along the machined parts or where the metal sensor tip is fitted directly into a drilled hole.

Customer-specific solutions

Whether in the high-pressure range, e.g. for use in polyethylene synthesis, or as multipoint thermocouple for the chemical industry. The wide WIKA product portfolio offers a multitude of customer-specific solutions.

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How does a thermocouple work? | Thermocouples per IEC 60584-1 and ASTM E230
Videos How does a thermocouple work? | Thermocouples per IEC 60584-1 and ASTM E230

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FAQ
FAQ

How thick is the wall thickness of an MI cable?

Most manufacturers give a minimum wall thickness which corresponds to 10% of the external diameter of the MI cable.