A method for measuring the dynamic viscosity and the density as physical quantities of an essentially non-compressible measuring medium may include introducing a non-compressible measuring medium in a vessel charged with a compressible medium, where the non-compressible measuring medium constitutes a fraction volume of a total volume of the vessel. The method further includes measuring an initial pressure of the compressible medium, modifying the total volume of the vessel by a predetermined modification volume, and measuring a modified internal pressure of the compressible medium in the vessel effected by the volume modification. Finally, the method may include causing liquid measuring medium to flow through an opening of the vessel through a capillary tube, where the modification internal pressure is measured at one measuring point and where the initial pressure of the compressible medium surrounding the liquid measuring medium is measured after discharge out of the capillary tube.