Patent ID: 8171802

Claim:
A method of measurement of a volume V D of a flow-rate of electrical conductive liquids a conductivity of which is at least codetermined by at least one parameter p, wherein the liquid flows through a vessel having a predetermined shape, and wherein the respective filling volume V 0 in the vessel is determined by at least one measured value x, which is measured by an electrical conductivity measuring device comprising at least two measuring electrodes, wherein the vessel is filled in succession and then is emptied through its outlet, through which filling heights h are constantly changing, comprising the steps of: measuring the measured values x in time intervals and determining the respective filling volumes V 0 by comparison of the respective measured values x with calibration measured values x R of at least one reference table comprising at least calibration measured values x R and filling volumes V 0 belonging to them, and determining the volume V D of the rate of flow from the filling volumes V 0 over a time period, wherein the at least one reference table is constructed by means of calibration measurements using several liquid samples, which have different p-values and different filling heights h in the vessel.