A polarographic sensor

G - Physics – 01 – N

Patent

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Details

G01N 27/48 (2006.01)

Patent

CA 2250469

A polarographic sensor device to determine the partial pressure of a gas in a sample medium is disclosed. The device comprises a) a substantially hydroscopic electrolyte composition joining a pair of spaced apart electrodes, one of the pair of electrodes being a sensing electrode; b) a membrane permeable to gas but impermeable to the electrolyte, the membrane having a front section for separating the electodes and the electrolyte from the sample medium; and c) a fastener comprising a sleeve having a body portion and a lip, the body portion retaining the fastener and a side section of the membrane, and the lip retaining a portion of the front section of the membrane and holding substantially the entire front section in a spaced apart relationship from the sensing electrode.

L'invention concerne un détecteur polarographique destiné à déterminer la pression partielle d'un gaz dans un milieu d'échantillons. Ce dispositif comprend: a) une composition électrolytique pratiquement hydroscopique réunissant une paire d'électrodes espacées, l'une de ces paires d'électrodes étant une électrode de détection; b) une membrane perméable au gaz, mais imperméable à l'électrolyte, comportant une section frontale destinée à séparer les électrodes et l'électrolyte du milieu d'échantillons; et c) un élément de fixation comprenant un manchon constitué d'une partie corps et d'un rebord, cette partie corps retenant l'élément de fixation et une section latérale de la membrane, et le rebord retenant une partie de la section frontale de la membrane et maintenant pratiquement toute cette section frontale espacée de l'électrode de détection.

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