High Pressure Electronic Controller


Precise, convenient control up to 3000 psig

The EPR-3000 is a significant advance in the precision and convenience of electronic pressure control above 1000 psig.
Using dual analog valve construction, the EPR-3000 avoids the waste of inert supply gas present with some competitive solutions. The analog valves also provide for high resolution in the range of 0.1%.

  • For inert gas
  • Dual analog valve construction
  • No gas supply wasted at steady state
  • Very high resolution with 0.25% accuracy
  • Digital or analog communications with keypad option

Convenient Communication & Connections

The EPR-3000 can be quickly commanded using the convenient keypad interface. For system automation, the device can be automated through either the 0 – 5 VDC analog interface or by use of a Serial (RS-458) connection. Power supply for the unit (12-30 VDC) can be provided through an included power brick, or provided through the DIN connector.

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The EPR-3000 control pressure precisely in the high pressure range of 0-3000 psig

The EPR-3000 control pressure precisely in the high pressure range of 0-3000 psig. ( Details)



The PCD-3000 is designed for static to low- flow applications of inert gas such as nitrogen or air.
One common application is to provide a high pressure pilot signal for dome-loaded regulators requiring pressures above 1000 psig. In the schematic at right, the EPR-3000 is used to control the output pressure of a catalyst research reactor. Because both the EPR-3000 and the back pressure regulator have no significant hysteresis or dead-band, it is possible to precisely control reaction conditions even with highly varying process flow rates.

Catalyst Research Reactor with EPR

How it Works

Two valve pressure controllers include a “fill” and “vent” valve. Outlet pressure is sensed and controlled through a type of PID loop. While many industrial pressure controllers utilize binary fill and vent valves, or analog fill valves with binary vent valves, the EPR-3000 uses two analog valves for highly precise and resolute control throughout the entire range.

EPR Schematic for EPR-3000