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Pyrometric (Mini) Bars
Orton’s Mini Pyrometric Bars offer potters a compact and reliable way to monitor heatwork in a kiln. These slender ceramic devices accurately indicate the combined effect of temperature and time, ensuring that pottery receives the optimal amount of heat during firing. Orton Bars are specifically designed to work seamlessly with the Kiln-Sitter®, making them an indispensable choice for anyone who relies on this controller. Discover the range of Pyrometric Bars available at Potclays below.
The Use of Mini Pyrometric Bars
Mini bars are easy to position due to their uniform shape, allowing consistent placement without affecting the kiln’s firing behaviour. This makes them ideal for beginners, who will appreciate their ease of use, while experienced ceramic artists will value their stable, repeatable heat measurements. When a bar bends under heat, it provides a visual reference that the target temperature has been achieved.
Whether working at Cone 017, 01, 06 or the mid-range bars such as Cone 10, these Orton pyrometric mini bars help you monitor kiln firing performance across batches, kilns, and firing schedules.
Click here to download our Orton Cones Conversion Chart
Differences Between Bars
Each bar corresponds to a specific cone number, reflecting a distinct temperature range and the amount of heat required to bend it. Standard cones are typically displayed upright in plaques, while Orton Mini Bars are laid horizontally inside a Kiln-Sitter®. This design ensures that the bending action triggers the shut-off mechanism at the correct point, providing your work with the proper amount of heat rather than relying solely on a set temperature per hour.
Different bar numbers are suited to various clay bodies, glazes, and firing processes. For instance, lower bars are ideal for lustres and low-fire glazes, while Cone 6 and above are suitable for stoneware firings. Their compact shape makes them perfect for potters with smaller kilns or those who prefer minimal handling and straightforward placement.
Why Choose Potclays?
At Potclays, we're proud to be a leading supplier of ceramics supplies such as clay, glazes, tools and accessories, utilising over 90 years of experience to curate product ranges. We're a one-stop shop for potters of all skill levels, from hobbyists to professional studios.
Need help finding the right product for you, or looking for more information? Get in touch with us today, we're happy to help.
