GDS Instruments Pressure Volume Controllers are general-purpose water pressure source and volume change gauges for the precise regulation and measurement of fluid pressure and volume change. Pressure applications from 0 up to 100MPa of wateroilair, with accurate measurement of volume change, all of which are capable of being logged and controlled by PC. The Enterprise Level PressureVolume Controller (ELDPC) is aimed at commercial testing (max 1MPa). The Standard PressureVolume Controller (STDDPC) is aimed at medium pressure commercial testing