Functionality and performance are identical EDS-300 Series pressure switch products with Germany HYDAC EDS300 series pressure switch indicators and a considerable price advantage. Is an ultra-compact pressure control instrumentation, hydraulic, pneumatic system pressure display and control. The instrument uses a low-power, high-precision pressure sensor circuit with high-performance single-chip microprocessor as part of the core simulation with digital display and touch switch input interface, with a switch (alarm) output and analog output, three red digital display, can also be made into four digital display. It is a reasonable choice can work reliably under conditions of mechanical relays incompetent (such as wide range, the pressure intense vibration, high-precision control).