A bimetal thermostat thermostat is a temperature control device that relies on the principle of differential expansion between two metals with different coefficients of expansion. This simple yet effective mechanism has been widely used in various industries for over a century. Its design and function remain relevant today, particularly for devices where precise temperature control is not as critical as reliability and cost-efficiency. In this article, we will explore how bimetal thermostats work, their applications, advantages, and some of the limitations they might have compared to modern electronic thermostats.

    Understanding the Bimetal Thermostat Mechanism

    At the heart of the bimetal thermostat thermostat is the bimetallic strip, which is made of two different metals that are bonded together. These metals typically have different thermal expansion rates—when heated, they expand at different rates. As a result, when the temperature rises, the strip bends or curves due to the differing expansion rates of the two metals.