Sensor for Measuring Gas Permeability of a Test Material
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Abstract
A sensor for measuring gas permeability of a test material, comprising: an electrically conductive sensing element that comprises a water and/or oxygen sensitive material, wherein the reaction of said material with water or oxygen when the sensing element is contacted with water and/or oxygen results in a change in the electrical conductivity of the sensing element, and two electrodes electrically connected to the sensing element.
25 Citations
72 Claims
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1-36. -36. (canceled)
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37. A sensor for measuring gas permeability of a test material, comprising:
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an electrically conductive sensing element that comprises a water and/or oxygen sensitive material, wherein the reaction of said material with water or oxygen when the sensing element is contacted with water and/or oxygen results in a change in the electrical conductivity of the sensing element, two electrodes electrically connected to the sensing element, a base substrate that supports the sensing element, and a liner layer interdisposed between the sensing element and the base substrate. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67)
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68. A method of producing a sensor for measuring gas permeability of a test material, said method comprising:
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providing a base substrate that supports a sensing element and that further comprises a liner layer, depositing on the liner layer an electrically conducting sensing element that comprises a water and/or oxygen sensitive material so that the liner layer is interdisposed between the base substrate and the sensing element providing two electrodes, and connecting the electrically conductive sensing element to said pair of electrodes. - View Dependent Claims (69)
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70. A system for measuring the gas permeability of a test material, said system comprising a sensor for detecting moisture permeation through the test material, said sensor comprising:
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an electrically conductive sensing element that comprises a water and/or oxygen sensitive material, wherein the reaction of said material with water or oxygen when the sensing element is contacted with water and/or oxygen results in a change in the electrical conductivity of the sensing element, and two electrodes electrically connected to the sensing element, wherein the electrodes provide electrical connection between the sensing element and an electrical signal evaluation means, a base substrate that supports the sensing element, and a liner layer interdisposed between the sensing element and the base substrate.
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71. A method of determining the gas permeability of a test material using a sensor for measuring gas permeability of the test material, said sensor comprising:
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an electrically conductive sensing element that comprises a water and/or oxygen sensitive material, wherein the reaction of said material with water or oxygen when the sensing element is contacted with water and/or oxygen results in a change in the electrical conductivity of the sensing element, and two electrodes electrically connected to the sensing element, wherein the electrodes provide electrical connection between the sensing element and an electrical signal evaluation means, a base substrate that supports the sensing element, and a liner layer interdisposed between the sensing element and the base substrate wherein said method comprises;
contacting the sensing element with water and/or oxygen;
measuring the changes in electrical conductivity of the sensing element over a period of time; and
calculating the gas permeability coefficient of the test material based on the measurements. - View Dependent Claims (72)
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Specification