Method and apparatus for measuring the oxygen potential of a heat-treatment furnance
AssigneeIpsen Industries International Gesellschaft mit beschrankter Haftung
InventorsWerner Gohring, Maz Roggatz, Bernd Edenhofer
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Abstract
A probe for measuring oxygen potential, especially to determine the carboransfer properties of a furnace atmosphere containing the gases H.sub.2, CO, and CH.sub.4, with the probe having an oxygen ion conducting, solid measuring electrolyte with a contact electrode in the furnace atmosphere and a contact electrode in a reference medium that has a known oxygen concentration. To improve the accuracy of the measurement, an oxygen ion conductive compensation electrolyte in the form of a detachable solid body is connected between the contact electrode in the furnace atmosphere and the solid measuring electrolyte.
Claims15
A probe for measuring the oxygen potential of a furnace atmosphere relative to a reference medium of a known oxygen potential, especially to determine the carbon-transfer properties of a furnace atmosphere containing the gases H.sub.2, CO, and CH.sub.4, said probe comprising:
- an oxygen ion conducting solid measuring electrolyte exposed with a first surface to said furnace atmosphere and with a second surface to said reference medium;
- an oxygen ion conducting compensation electrolyte means for compensating oxygen potential deviations of said measuring electrolyte at said first surface in said furnace atmosphere, said compensation electrolyte means comprising a first solid body detachably connected to a portion of said first surface in said furnace atmosphere;
- a first contact electrode connected to said compensation electrolyte means remote from said portion of said first surface;
- and
- a second contact electrode connected to a portion of said second surface in said reference medium.
A method for measuring the oxygen potential of a furnace atmosphere relative to a reference medium of a known oxygen potential, especially to determine the carbon-transfer properties of a furnace atmosphere containing the gases H.sub.2, CO, and CH.sub.4, said method comprising the steps of:
- exposing a first surface of an oxygen ion conducting solid measuring electrolyte to said furnace atmosphere and a second surface to said reference medium;
- detachably connecting an oxygen ion conducting compensation electrolyte means that comprises a solid body between a first contact electrode and a portion of said first surface for avoiding oxygen potential deviations of said measuring electrolyte at said first surface in said furnace atmosphere by eliminating contact between said first surface of said measuring electrolyte and said first contact electrode;
- and
- connecting a second contact electrode to a portion of said second surface in said reference medium.
Dependencies are inferred from the claim text.