Pyrometric bars are ceramic tools used to measure temperature in a kiln. They are made of materials that bend at a specific temperature, providing a visual indicator that the desired temperature has been reached. They are often used in conjunction with automatic devices, such as a sitter, that turn off the kiln when the rod has bent enough to release a switch.
These bars help to ensure that the pieces are fired at the correct temperature, avoiding both overheating and insufficient temperatures, which is key to the maturation of the glazes and proper vitrification of the clay. They also allow more precise control in firing high-temperature ceramics, such as stoneware and porcelain.
Interesting Fact
The pyrometer bars not only indicate the temperature, but also the "working heat" or the amount of time the parts have been exposed to heat, which is crucial for consistent results.
Helpful Tip
Use pyrometer rods in different parts of the kiln to ensure that all areas reach the correct temperature, especially if you are firing a large number of pieces.
