A bimetal thermostat is a mechanical temperature control device that uses the principles of differential thermal expansion between two metals to regulate temperature. These thermostats are widely used in various applications, from household appliances to industrial machines, and they are known for their simplicity, reliability, and long lifespan. Despite the rise of digital and electronic temperature control systems, the bimetal thermostat remains a favored choice due to its low cost, durability, and ease of operation.

    The Working Principle of a Bimetal Thermostat

    The core component of a bimetal thermostat consists of two metals with different coefficients of thermal expansion, which are bonded together to form a bimetallic strip. As the temperature of the environment changes, the two metals expand or contract at different rates. This results in the bending or warping of the bimetal strip. The amount of bending is directly related to the temperature—when the temperature rises, the strip bends in one direction; when the temperature drops, it bends in the opposite direction.