The small pressure gauge is electronic-structure and battery-powered, which makes it very easy for on-site installation. Specifically, a high-precision pressure sensor is used and the output signal is processed by the high-precision, low temperature drifting amplifier, then sent into the high-precision A/D converter to be converted into a digital signal, after being computed and processed, the actual pressure value is showed on the screen.
It has some benefits: flexible use, simple operation, easy debugging, safety, reliability, etc. So they have been widely used in hydro-power, water, petroleum, chemical, mechanical, hydraulic, and other industries.