What type of energy does a Bourdon tube primarily measure?

A Bourdon tube is a mechanical device commonly used for measuring pressure. It operates based on the principle of elastic deformation. When pressure is applied to the inside of the tube, it tend to straighten or change shape, and this movement is translated into a readable measurement on a dial or gauge. The fundamental operation of a Bourdon tube relies on the pressure exerted by the fluid or gas inside it, making it specifically designed for measuring pressure energy.

In the context of the other forms of energy listed, electrical energy relates to the flow of electric current, kinetic energy pertains to the energy of moving objects, and thermal energy is associated with temperature and heat transfer. These forms do not apply to the function of a Bourdon tube, which is specifically created to gauge pressure levels in various applications, such as in industrial settings, HVAC systems, or even in scientific experiments.