Patent ID: 7608177
Filing Date: 2009-10-27
Classification: G01N,Y02E

Abstract:
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.