Sculpey Oven Dial Thermometer You can stand it up on an oven tray or hang it The Sculpey oven thermometer is a precision measurement instrument crafted to offer unmatched accuracy and readability for optimal performance. Ovens vary in temperature from top to bottom and side to side. The only accurate check on oven temperature is a high quality oven thermometer placed alongside the polymer clay creation being baked. This thermometer is designed for use with polymer clay. It is made from durable stainless steel.