Importance

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Abstract

A probe submersible in a liquid to continuously analyze the concentration of a gas such as oxygen dissolved therein. The probe is constituted by a casing having an open mouth covered by a gas-permeable membrane to define a chamber filled with an electrolyte. Disposed within the chamber is a measuring electrode and a counter-electrode, the front face of the measuring electrode being slightly spaced from the rear surface of the membrane to create a gap that is filled by the electrolyte. Holes are formed in the measuring electrode to permit the passage of electrolyte between the front and rear faces thereof, the rear face being coated with an insulating layer to prevent an electrochemical reaction between this face and the electrolyte whereby the probe is then insensitive to dissolved gas contained in the electrolyte and responds only to gas contained in the liquid being analyzed. The walls of the holes may also be lined with an insulation layer for the same purpose.

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First Claim