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Flow gap gas distribution adapter for an electrochemical gas sensor

  • US 6,793,786 B2
  • Filed: 03/28/2002
  • Issued: 09/21/2004
  • Est. Priority Date: 07/13/2001
  • Status: Active Grant
First Claim
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1. An adapter and an electrochemical gas sensor, comprising:

  • an electrochemical gas sensor housing accommodating an electrolyte;

    a measuring electrode arranged in the housing in contact with the electrolyte;

    a membrane that screens the measuring electrode and the electrolyte from the measured gas and is permeable to the measured gas for mass exchange between the electrolyte and the measured gas;

    an adapter with a gas-impermeable surface, the adapter and the electrochemical gas sensor housing forming an inlet for feeding in a measured gas to the side of the membrane located opposite the measuring electrode, the adapter and the housing forming an outlet for removing the measured gas from the side of the membrane located opposite the measuring electrode, the adapter gas-impermeable surface extending in parallel to and at a spaced location from the membrane between the inlet and the outlet for the measured gas, the adapter and the membrane cooperating to form a flow gap for the measured gas, wherein the flow gap has a rotationally symmetrical design with the membrane shaped as an outer cylinder jacket formed around an axis of rotation and with the gas-impermeable surface shaped as an inner cylinder jacket and arranged coaxially with the outer cylinder jacket.

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