A bimetallic strip is a mechanism for measuring temperature mechanically by joining or bonding together two metals having different coefficients of expansion. On a rise in temperature, one metal elongates more than the other, and it bends due to the differential expansion, making it useful for temperature control and measurement.

Key Features: 

• Composition and Functioning: A bimetallic strip contains two metal layers like steel and brass or steel and copper. When both of these are heated, they expand at different rates, which indicates that the strip will bend predictably. 

• Thermal Sensitivity: Therefore, bending would differ according to temperature change and metals employed, thus indicating a very trustworthy mechanism for temperature control. 

• Different Purposes: Bimetallic strips are found in thermostats, circuit breakers, and temperature sensors of various equipment, including household, industrial, and automotive applications. 

 They provide an uncomplicated, low-cost means of managing and measuring temperatures without the need for electric power. Thermostats use this mechanism to close and open electrical contacts at certain ranges of temperature to regulate heating and cooling. In industry, they ensure that machinery safely operates under limit conditions and does not overheat. The ongoing improvements in material sciences and precision engineering were continuously developing the more robust designs and broader applications of bimetallic types in modern technology.

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