Sulfur resistant sensors
First Claim
Patent Images
1. A device for sensing a concentration of a combustible specie of interest, the device including:
- a holder;
a first RTD disposed in a first cover, wherein the first cover is mounted to the holder;
a second RTD disposed in a second cover, wherein the second cover is mounted to the holder; and
wherein the first cover has a higher catalytic activity to the specie of interest than the second cover.
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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.
30 Citations
36 Claims
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1. A device for sensing a concentration of a combustible specie of interest, the device including:
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a holder;
a first RTD disposed in a first cover, wherein the first cover is mounted to the holder;
a second RTD disposed in a second cover, wherein the second cover is mounted to the holder; and
wherein the first cover has a higher catalytic activity to the specie of interest than the second cover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device for determining a concentration of a combustible specie of interest in an exhaust stream, the device including:
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a solid electrolyte;
a reference electrode that is inactive to the combustion reaction; and
a working electrode that is catalytically active to the combustion reaction and wherein the working electrode and the reference electrode are coupled to the solid electrolyte. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A solid state device for determining the concentration of oxygen in a gas phase, the device comprising:
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a solid electrolyte;
a reference electrode coupled to the solid electrolyte; and
a working electrode constructed from a mixed ion/electron conducting oxide, wherein the working electrode is coupled to the solid electrolyte. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A process analytic system comprising:
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a sample probe having at least one sulfur-resistant sensor disposed therein;
a controller coupled to the sample probe to measure a parameter of an exhaust stream; and
a blowback system coupled to the sample probe and the controller to responsively reverse gas flow through the sample probe. - View Dependent Claims (33, 34, 35, 36)
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Specification