cone (pyrometric cone)

A pyrometric cone is a small, specially formulated ceramic test device used to measure high temperatures in kilns. It is made from precise mixtures of materials that melt or bend at specific, known temperatures. When placed in a kiln during firing, the cone gradually bends or softens as it reaches its designated temperature, providing a visual indication of temperature accuracy. This helps potters and ceramicists ensure their kiln is operating at the correct temperature for firing pottery or glazes, contributing to consistent and successful results without the need for electronic temperature sensors.