What are the shapes of bi metal elements?

Bimetal elements typically take the form of strips or plates composed of two different metals bonded together, which expand at different rates when heated. This differential expansion causes the bimetal to bend or curve in a specific direction, making them useful in applications like thermostats and temperature sensors. The shapes can vary depending on the application, but they are commonly found as flat strips coiled into a spiral or curved shapes for optimal functionality.