Figure P 2.161 shows a sketch of a commercial pressure gage....

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Key Concepts

Pressure Measurement

This concept involves quantifying the force per unit area exerted by a fluid on a surface. In pressure gauges, this measurement is crucial because it converts the physical pressure in the system into a value that can be displayed to the user, allowing for monitoring and control of processes.

Mechanical Transduction

Mechanical transduction refers to the conversion of one form of energy into another—in this case, the conversion of pressure-induced stress or strain into mechanical movement. In many pressure gauges, a component deforms under pressure, and that deformation is transformed into the movement of an indicator or needle, which provides a visual reading.

Bourdon Tube Mechanism

A Bourdon tube is a common mechanical element used in many pressure gauges. It is typically a curved tube that tends to straighten when pressurized. As pressure increases, the tube deforms in such a way that its free end moves. This movement is mechanically linked to a dial through gears and linkages, resulting in a visual indication of the measured pressure.

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