G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/31 (2006.01) C12M 1/34 (2006.01) G01N 7/10 (2006.01) G01N 21/55 (2006.01) G01N 21/61 (2006.01) G01N 33/00 (2006.01)
Patent
CA 2259275
The present invention relates to a device for measuring the partial pressure of gases dissolved in liquids. Said device contains (a) a measuring point (15) which is partially separated by a gas-permeable membrane (11) permeable to the gas to be determined; (b) a light emission source (6) for producing a light ray interacting with the liquid in the measuring point (15) and having a wave length which is absorbed by the gas to be determined; and (c) a measuring arrangement (7) for determining the light leaving the measuring point (15). Said device is characterised in that (d) the measuring point (15) is in contact with the interface of a photoconductive element (14), and (e) the light is guided through said element (14) in such a manner that total reflection thereof is reduced at the interface.
La présente invention concerne un dispositif pour mesurer la pression partielle de gaz dissous dans des liquides. Ce dispositif comporte (a) un point de mesure (15) qui est partiellement isolé par une membrane perméable aux gaz (11), laquelle est perméable au gaz à déterminer; (b) une source d'émission lumineuse (6) pour produire un faisceau lumineux assurant une interaction avec le liquide dans le point de mesure (15) et présentant une longueur d'onde qui est absorbée par le gaz à déterminer; et (c) un système de mesure (7) permettant de déterminer la lumière quittant le point de mesure (15). Ce dispositif est caractérisé en ce que (d) le point de mesure (15) est en contact avec l'interface d'un élément photoconducteur (14), et (e) la lumière est guidée à travers ledit élément (14) de telle manière que sa réflexion totale est affaiblie au niveau de l'interface.
Buchholz Rainer
Dieckmann Michael
Euroferm Gmbh
Kirby Eades Gale Baker
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