A digital pressure gauge measures the pressure within a system or process in an electronic way. Digital pressure gauges transform the measured pressure into an electronic signal and display it on an integrated digital screen. Some electronic pressure gauge models even feature data hold, conversion, or an analogue graph-style readout.
Through this digital display, the gauge shows the pressure with high accuracy with clear visibility. This makes digital pressure gauges suited for calibration, testing and control applications. The high accuracy is what separates digital pressure gauges from regular pressure gauges. A digital pressure gauge can be supplied with a testing and calibration certificate if required.
Digital pressure gauges use a pressure sensor to convert the pressure of the process into an electrical signal. The piezoresistive pressure sensor is the most commonly used digital gauge sensor. This type of sensor consists of a small diaphragm equipped with piezoresistive elements. The applied pressure of the medium on which the gauge is installed causes the diaphragm to move.
This movement causes a change in the cross-sectional area of the piezoresistive elements that are directly coupled to the electrical resistance. The digital pressure indicator transforms this resistance into either bar, psi, ksi, or other settings available on the selected gauge model.
Besides, the main reason that digital pressure gauges are more accurate than regular gauges and, therefore, more suited for calibration functions. There are some options electronic pressure gauges possess that regular gauges don’t.