^{Digital Pressure Gauges Working Principle}

Digital pressure gauges use pressure sensors that convert pressure to an equivalent electronic signal. Different types of pressure sensors are suitable for digital gauges; however, piezoresistive pressure sensors are used most frequently due to their robust design and lower price than capacitive sensors.

A piezoresistive pressure sensor consists of a diaphragm equipped with piezoresistive elements. The pressure of the medium causes the diaphragm to deflect; this deflection causes a change in the cross-sectional area of the piezoresistive elements that changes the material’s electrical resistance creating a voltage difference. The gauge's internal microprocessor then processes the voltage to display a pressure reading on the digital display.

Some digital gauges also have additional features such as temperature compensation, data logging, and wireless connectivity. Read our electronic pressure measurement principles article for an in-depth guide on how different sensor types work.

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