The intelligent digital explosion proof pressure switch uses high precision pressure sensor as the detection element, and uses CPU modular signal processing technology to realize the detection, display and alarm of the medium pressure signal (switch output). It has the characteristics of high precision, small hysteresis, fast response and stable and reliable performance. It is widely used in hydrology, electric power, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid medium on site.