Pressure gauges are the silent guardians of many industrial processes and everyday applications. These unsung heroes keep tabs on the pressure of gases or liquids, ensuring everything from pipelines to car tires function safely and efficiently. The most common type, the Bourdon tube gauge, uses a clever trick: a curved metal tube straightens as pressure increases, which a linked pointer translates into a reading on a dial. For low pressures or corrosive environments, diaphragm gauges step in, with a thin membrane that deflects with pressure changes. No matter the type, pressure gauges play a vital role in keeping our world running smoothly, one measured unit at a time.