Thermocouples and Sheaths
Thermocouples are crucial components in every kiln and furnace, enabling precise temperature measurement and control during firing. Potclays offers a comprehensive range of thermocouples and protective sheaths, engineered to deliver exceptional precision, durability, and a long service life in even the most demanding ceramic environments. From compact thermocouples suitable for top-loading kilns to robust flange head models featuring recrystallised alumina sheaths, each product is meticulously crafted to withstand repeated high-temperature cycles. Please take a look at our options below.
What are Thermocouples?
A thermocouple, a temperature sensor made from two dissimilar metal wires joined at one end, generates a voltage that changes with heat. In ceramic kilns, this voltage is translated into an exact temperature reading, enabling precise control over firing curves, soak times, and cooling rates.
Potclays offers both L&L thermocouple elements and complete assemblies for consistent and reliable temperature monitoring across a range of kiln types.
What are Sheaths?
Thermocouple sheaths act as protective barriers, safeguarding the temperature sensor from oxidation, corrosion, and mechanical damage during firing.
Potclays’ range includes recrystallised alumina sheaths, renowned for their exceptional thermal conductivity and resistance to chemical attack in high-temperature atmospheres. These sheaths extend the lifespan of thermocouples and provide more stable readings across multiple firings.
Common Benefits and Uses
Thermocouples and sheaths are essential components in ceramics, glass, and heat-treatment applications. They ensure reliability and precision by maintaining consistent kiln temperatures, protecting sensitive components from contamination, and preventing premature wear caused by extreme heat.
These components, engineered to perform consistently at temperatures exceeding 1200°C, are suitable for both industrial and studio settings.
Why Choose Potclays?
Whether you’re replacing a single sensor or maintaining a full kiln setup, Potclays offers high-quality components, expert advice, and dependable support. Each product is backed by our long-standing commitment to the ceramics community. We're proud to be a one-stop shop for products like clay, glaze, pottery tools and accessories.
We're here to help you find the right product, whatever your requirements are. If you're a hobbyist, an educator or even a studio professional, we're sure you'll find exactly what you need at Potclays.
Need guidance or advice? Get in touch with us today - we're happy to help.

