What are bimetal thermoeters?

Bimetal thermometers are temperature measurement devices that rely on the principle of thermal expansion of metals. They consist of two different metals bonded together, which expand at different rates when heated. This differential expansion causes the bimetallic strip to bend, and the degree of bending is translated into a temperature reading on a dial or scale. They are commonly used in various applications due to their simplicity, durability, and ability to provide accurate readings without the need for external power sources.