Thermometer that uses the difference in expansion of two metals (usually iron and brass) to measure temperatures between 30°C or 86°F and 300°C or 375F°; it is used especially in industry.
Outer covering that encloses and protects the device’s mechanism.
Metal needle connected to the shaft that indicates the temperature on the dial.
Graduated face with a pointer in front to indicate the temperature.
Rod that transmits the bimetallic helix’s rotational motion to the pointer as a result of warping caused by heat.