What component does a Bourdon tube measure?

A Bourdon tube is specifically designed to measure pressure. It operates based on the principle that a curved tube tends to straighten when internal pressure is applied. As the internal pressure increases, the tube expands and straightens out. This mechanical movement is then translated into a dial reading, indicating the pressure level within a system.

The construction of the Bourdon tube—usually made of metal—allows it to withstand high pressures, making it a widely used instrument in various applications, such as in steam boilers, gas systems, and other industrial processes where monitoring pressure is critical for safety and operational efficiency. Its ability to provide accurate and reliable pressure readings is what makes it a staple tool in the field of power engineering and many other disciplines.