Patent Number: 6,192,737

Title: Method for measuring the concentration of a dissolved gas in a fluid

Abstract: The invention pertains to a method for measuring the concentration of dissolved gases in a liquid [(39)], especially of CO.sub.2 in beverages, in which the liquid [(39)] is passed across the retentate side [(140)] of a membrane [(14)] that is at least partially permeable to the dissolved gas, and [in which] the volumetric flow of the permeated gas on permeate side [(16)] of the membrane [(14)] is determined, the temperature of the liquid [(39)] is measured, and the concentration of the dissolved gas in the liquid [(39)] is calculated from these values. In this, the thickness of the membrane [(14)] can be pre-selected as a function of the flow rate of the liquid [(39)] flowing along the retentate side [(140)].

Inventors: Ohlrogge; Klaus (Geesthacht, DE), Hasler; Carsten (Hamburg, DE), Wind; Jan (Lauenburg, DE), Cegla; Dieter (Seevetal, DE), Steffens; Franz Josef (Bayrischzell, DE)

Assignee: Rosemount Analytical Inc.

International Classification: G01N 33/14 (20060101); G01N 33/02 (20060101); G01N 7/10 (20060101); G01N 7/00 (20060101); G01N 007/10 (); G01N 033/14 ()

Expiration Date: 02/27/2018