There are numerous pressure-gauging technologies available today including digital and analogue pressure gauges. Digital pressure gauges transform the applied pressure into signals and display the readouts numerically. Devices using mechanical deflection include a flexible or elastic element like a diaphragm that reacts to a change in pressure.
On the other hand, there are digital pressure gauges that include a diaphragm and a bridge circuit, but they detect changes in capacitance. Typically, strain-sensitive variable resistors or strain gauges are the basic elements used in Wheatstone bridge circuits that do this measurement. Other digital pressure gauges use vibrating elements, a thin film, pistons or micro electromechanical systems (MEMS) for sensing pressure changes.
There are some devices that use piezoelectric sensors for measuring quasi-state and dynamic pressure. These sensors have two modes:
Voltage mode – uses an amplifier for converting the high-impedance charge into a low-impedance output voltage.
Charge mode – is used for generating a high-impedance charge.
What are digital pressure gauges used for?
Digital pressure gauges perform numerous pressure measurements and display the amount in different units. Absolute pressure is a type of pressure measurement that is relative to a perfect vacuum.
