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Thermocouple Specifications

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What is a thermocouple sensor?

A thermocouple is a sensor for measuring temperature. It consists of two dissimilar metals, joined together at one end. When the junction of the two metals is heated a voltage is produced that can be converted back to the temperature using a pyrometer or electronic controller.


What are the different thermocouple types?

A thermocouple is available in different combinations of metals or calibrations. The most common types used in kilns are K, N and R.


How do I know what thermocouple type to choose?

Type K Thermocouple (Nickel-Chromium / Nickel-Alumel):
The type K is the most common type of thermocouple.
It’s inexpensive, accurate, reliable, and has a wide temperature range.
Type K thermocouples generally have yellow leads with a yellow (+) and a red (-) wire.

Type N Thermocouple (Nicrosil / Nisil):
The Type N shares similar accuracy and temperature limits as the Type K.
Type N thermocouples generally have orange leads with a orange (+) and a red (-) wire

Recommended temperature Range K & N types: 1100deg c Constant Range –270 to 1300C

When using K & N types a ceramic sheath is suggested to prolong thermocouple life and stop metal scale from falling off into your kiln if firing to stoneware a sheath is required.

Type R Thermocouple (Platinum Rhodium -13% / Platinum):
The Type R is used in very high temperature applications.
It has a higher percentage of Rhodium than the Type S, which makes it more expensive.
The Type R is very similar to the Type S in terms of performance.
Type R has a slightly higher output and improved stability over the type S.
Type R thermocouples generally have green leads with a black (+) and a red (-)wire

Type R are recommended if regular firing to stoneware temperatures.
Type R will last significantly longer than a K or N.
They come with a sheath as part of the thermocouple assembly.

Recommended temperature range Type R: -50 to 1480C


How do I know the correct length for my Kiln?

The thermocouple on a electric kiln requires the metal tip to be around 5cm inside the chamber.
On a gas kiln 10 to 15 cm is recommended.

Thermocouple Length

See page 2 in our assembly manual for detailed pictures and instructions.


How do I assemble and install a thermocouple kit on my Kiln?
Click here to download our assembly instruction manual

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