Sulfur resistant sensors
First Claim
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1. A solid state device for determining the concentration of oxygen in a gas phase,the solid state device comprising:
- a solid electrolyte;
a reference electrode coupled to a surface of the solid electrolyte and being exposed to a gas with a known partial pressure of oxygen; and
a working electrode including a mixed ion/electron conductor constructed from a ceria solid solution doped with at least one mixed valency element, wherein the working electrode is coupled to the same surface of the solid electrolyte as the reference electrode.
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Abstract
Sulfur resistant sensors and a process analytic system employing such sensors are provided. The sensors generally include a treatment or material that is adapted to increase the resistance of certain portions of the sensors to exposure to sulfur. In one aspect, an improved sulfur-resistant process analytic system includes a probe with one or more sulfur-resistant sensors therein coupled to a controller, a thermal control module, and a source of blowback gas.
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Citations
6 Claims
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1. A solid state device for determining the concentration of oxygen in a gas phase,
the solid state device comprising: -
a solid electrolyte; a reference electrode coupled to a surface of the solid electrolyte and being exposed to a gas with a known partial pressure of oxygen; and a working electrode including a mixed ion/electron conductor constructed from a ceria solid solution doped with at least one mixed valency element, wherein the working electrode is coupled to the same surface of the solid electrolyte as the reference electrode. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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Current AssigneeRosemount Incorporated (Emerson Electric Company)
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Original AssigneeRosemount Analytical, Inc. (Emerson Electric Company)
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InventorsMolnar, Ray, Manoharan, Ramasamy, Keyes, Marion, Blanar, Tom, Shuk, Pavel
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Primary Examiner(s)Olsen; Kaj K
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Application NumberUS10/607,856Publication NumberTime in Patent Office2,139 DaysField of Search204424-429, 204/431, 204/290.1, 205784-7855, 73/233.1, 422 94- 97US Class Current204/424CPC Class CodesG01N 27/4075 Composition or fabrication ...
