Electrochemical gas sensor with nonplanar diffusion membrane and electrode array
First Claim
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1. An electrochemical gas sensor, comprising:
- two electrodes;
a diffusion membrane;
an electrolyte, an outer housing with a conical, hemispherical or cylindrical outer housing shape and with gas admission openings;
a cover connected with said outer housing; and
a layer structure comprising, from adjacent to said outer housing with gas admission openings in a direction away from said outer housing with gas admission openings to-the-inside, the diffusion membrane with the two electrodes applied thereto in a planiform manner and a layer of a mat material or a porous body, which accommodates the electrolyte, an electrolyte space filled at least partially with the electrolyte, the electrolyte space being defined by said layer structure adjacent to said layer of mat material or porous body.
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Abstract
An electrochemical gas sensor, which has a substantially more compact design and is manufactured with a considerably reduced manufacturing effort. A conical, calotte-shaped, hemispherical or cylindrical outer housing is provided with gas admission openings (3, 203). A cover (8, 208) as well as a layer structure is provided with, from the outside to the inside, the diffusion membrane (4, 204) with the electrodes (5, 6, 7; 205, 206, 207) applied thereto in a planiform manner, a layer (11, 211) consisting of a mat material or a porous body, which accommodates the electrolyte, and an electrolyte space (10, 210), which is filled at least partially with the electrolyte.
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Citations
20 Claims
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1. An electrochemical gas sensor, comprising:
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two electrodes;
a diffusion membrane;
an electrolyte, an outer housing with a conical, hemispherical or cylindrical outer housing shape and with gas admission openings;
a cover connected with said outer housing; and
a layer structure comprising, from adjacent to said outer housing with gas admission openings in a direction away from said outer housing with gas admission openings to-the-inside, the diffusion membrane with the two electrodes applied thereto in a planiform manner and a layer of a mat material or a porous body, which accommodates the electrolyte, an electrolyte space filled at least partially with the electrolyte, the electrolyte space being defined by said layer structure adjacent to said layer of mat material or porous body.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of forming an electrochemical gas sensor, comprising:
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providing first and second electrodes, a diffusion membrane and an electrolyte, forming an outer housing with a conical, hemispherical or cylindrical outer housing shape and with gas admission openings;
providing a cover; and
forming a layer structure within the outer housing with the layer structure comprising, from the outside to the inside, the diffusion membrane with the two electrodes applied thereto in a planiform manner and a layer of a mat material or a porous body, which accommodates the electrolyte, the layer structure adjacent to said mat material or a porous body forming an electrolyte space filled at least partially with the electrolyte.
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10. An electrochemical gas sensor, comprising:
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an outer housing with gas admission openings;
a cover connected with said outer housing;
an electrolyte; and
a layer structure comprising a diffusion membrane adjacent to said outer housing, two electrodes applied in a substantially planiform manner to said diffusion membrane on a side opposite said admission openings and a layer adjacent to said electrodes, said layer being of a mat material or a porous body which accommodates the electrolyte, said cover being connected to said outer housing to delimit an exterior of the electrochemical gas sensor with a conical, hemispherical or cylindrical exterior shape with said layer structure conforming to the shape of the outer housing and cooperating with said cover to define an electrolyte space adjacent to said layer of a mat material or a porous body, the electrolyte space being at least partially filled with a portion of said electrolyte. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
(and ceramic fibers.
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16. An electrochemical gas sensor in accordance with claim 10, wherein electric lines associated with the electrodes are applied to the diffusion membrane in the form of contact paths or strip conductors.
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17. An electrochemical gas sensor in accordance with claim 16, wherein the electrodes and/or the electric lines are printed, sintered, sputtered or vapor-deposited on the diffusion membrane.
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18. A method of forming an electrochemical gas sensor, comprising:
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providing an outer housing with gas admission openings;
providing a cover;
forming a layer structure on an inner surface of the outer housing with a diffusion membrane adjacent to said outer housing, two electrodes applied to said diffusion membrane in a planiform manner on a side of said diffusion membrane opposite said outer housing and a layer of a mat material or a porous body;
providing a cover;
providing electrolyte; and
disposing the outer housing with the layer structure in one of a conical, hemispherical or cylindrical outer housing shape with the layer structure defining an electrolyte space and with the layer structure conforming to the shape of the outer housing;
filling the electrolyte space with the electrolyte;
and closing the electrolyte space with the cover by connecting the cover to the outer housing. - View Dependent Claims (19, 20)
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Specification