Pressure gauges are crucial instruments utilized in measuring the pressure of a gas or liquid in a system. They are extensively used in industrial processes to monitor and control pressure levels. A typical pressure gauge comprises a dial, a pointer, and a Bourdon tube, which is a curved metal tube that expands or contracts under pressure. As the pressure in the system changes, the Bourdon tube moves the pointer on the dial to indicate the pressure reading. Pressure gauges come in various types and sizes, including mechanical and digital gauges. They are used in a variety of applications.