Bimetallic thermometer

A bimetallic thermometer consists of a metal strip with two layers of different metals, which are bonded to one another in a material-locking or form-fitting manner. Characteristic is the change in shape with temperature change. This manifests itself as a distortion. The reason for this is the different thermal expansion coefficient of the metals used. These metals may be, for example, zinc and steel or steel in combination with the brass alloy