Electrochemical gas sensor
First Claim
1. An electro chemical gas sensor, comprising:
- at least one measuring electrode;
at least one counterelectrode;
a nonwoven layer, said at least one measuring electrode and said at least one counterelectrode cooperating with said nonwoven layer to form a stacked arrangement of electrodes and said nonwoven layer arranged in parallel with said nonwoven layer being a hydrophilic nonwoven material layer arranged between said electrodes;
a porous membrane, that is permeable to air, in contact on at least one side with said stacked arrangement of said electrodes and nonwoven layer arranged in parallel;
a housing defining a stacked arrangement of electrodes volume with said stacked arrangement of electrodes therein and a separate equalization volume filled with electrolyte at least partially, said porous membrane that is permeable to air and said hydrophilic nonwoven material layer extending from said stacked arrangement of electrodes volume into said separate equalization volume filled with electrolyte at least partially, said separate equalization volume being located at least partially in a plane with said electrodes and circumferentially surrounding said stacked arrangement of electrodes at least partially in the plane, said porous membrane that is permeable to air being exposed to ambient pressure at least in partial areas.
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Accused Products
Abstract
An electrochemical gas sensor with a stacked arrangement of electrodes and nonwoven layers arranged in parallel, comprising at least one measuring electrode (3) and at least one counterelectrode (5). A porous membrane (8) that is permeable to air is in contact with the stacked arrangement of electrodes and nonwoven layers arranged in parallel at least on one side, at least one layer of a hydrophilic nonwoven (7) is located between the electrodes. The porous membrane (8) that is permeable to air and the hydrophilic nonwoven (7) extend into a separate equalization volume (9), which is filled with electrolyte at least partially and is located at least partially in one plane with the electrodes. The separate equalization volume (9) surrounds the electrode arrangement at least partially in this plane, and the porous membrane (8) that is permeable to air is exposed to ambient pressure at least in partial areas. Such sensors are characterized by a flat shape, high insensitivity to shocks, independence from the position, and high tolerance to variations in environmental humidity.
31 Citations
27 Claims
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1. An electro chemical gas sensor, comprising:
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at least one measuring electrode; at least one counterelectrode; a nonwoven layer, said at least one measuring electrode and said at least one counterelectrode cooperating with said nonwoven layer to form a stacked arrangement of electrodes and said nonwoven layer arranged in parallel with said nonwoven layer being a hydrophilic nonwoven material layer arranged between said electrodes; a porous membrane, that is permeable to air, in contact on at least one side with said stacked arrangement of said electrodes and nonwoven layer arranged in parallel; a housing defining a stacked arrangement of electrodes volume with said stacked arrangement of electrodes therein and a separate equalization volume filled with electrolyte at least partially, said porous membrane that is permeable to air and said hydrophilic nonwoven material layer extending from said stacked arrangement of electrodes volume into said separate equalization volume filled with electrolyte at least partially, said separate equalization volume being located at least partially in a plane with said electrodes and circumferentially surrounding said stacked arrangement of electrodes at least partially in the plane, said porous membrane that is permeable to air being exposed to ambient pressure at least in partial areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An electrochemical gas sensor, comprising:
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a measuring electrode; a counterelectrode; a nonwoven layer, said measuring electrode and said counterelectrode cooperating with said nonwoven layer to form a stacked arrangement comprising said nonwoven layer arranged axially between said counterelectrode and said measuring electrode, said nonwoven layer being in contact with each of said counterelectrode and said measuring electrode and said nonwoven layer being in parallel with each of said counterelectrode and said measuring electrode, said nonwoven layer including a nonwoven layer extension extending radially outwardly from said stacked arrangement; a porous membrane, that is permeable to air, in contact on at least one axial side with said stacked arrangement and arranged in parallel to said nonwoven layer, said counterelectrode and said measuring electrode, said porous membrane including a porous membrane extension extending radially outwardly from said stacked arrangement; a housing defining a stacked arrangement volume with said stacked arrangement of electrodes therein and a radially outward separate equalization volume, said separate equalization volume being connected to said stacked arrangement volume via at least one opening through which pass only said nonwoven layer extension and said porous membrane extension, said separate equalization volume being located at least partially in a plane with said stacked arrangement and circumiferentially surrounding said stacked arrangement at least partially in said plane, said porous membrane being exposed by said housing, at least in partial areas, to ambient pressure; and electrolyte partially filling said separate equalization volume to provide electrolyte in said separate equalization volume and a remaining equalization space not filled with electrolyte. - View Dependent Claims (27)
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Specification