The media separator can be used wherever a required system pressure (e.g., cell pressure) is generated pneumatically, but the sample is to be subjected to water-hydraulic stress. In this case, the media separator acts as a converter or pressure intensifier with a 1:1 ratio. Typical applications include triaxial testing systems according to DIN EN ISO 17892-8/-9 and systems for determining water permeability according to DIN 18130-1.