Method for measuring the volume flow of electrically conductive liquids through a vessel

US8171802B2 · kind B2 · utility

Assignee

• BRITA LP · US

Inventors

• Colin Henderson · Missoula, US
• Uwe Lang · Taunusstein, DE
• Stefan Hother · Wiesbaden, DE
• Steven Bookbinder · Manchester, GB
• Thomas Kohler · Riedering, DE

Key dates

• Filing date: Mar 27, 2009
• Grant date: May 8, 2012
• Expiry date: May 19, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F23/24
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

It is described a method of measurement of the volume VD of the flow-rate of electrically conductive liquids the 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 Vo is determined by at least one measured value x, which is measured by an electrical conductivity measuring device comprising electrodes, wherein the vessel is filled in succession and then is emptied through its outlet, through which the filling heights h are constantly changing. At least one reference table comprising calibration measured values xR and filling volumes Vo belonging to them is constructed by means of calibration measurements using several liquid samples, which have different p-values and different filling heights h in the vessel. The measured values x are measured in time intervals and the respective filling volumes Vo are determined by comparison of the respective measured values x with values xR of the table, and the volume VD of the rate of flow is determined from the filling volumes Vo over a time period. The measuring device for the determination of the volume V…