Patent ID: 7052595

Claim:
A gas sensor system for determining a concentration of nitrogen oxide in a gas mixture, comprising: a gas sensor; and a device configured to detect nitrogen oxide in conjunction with the gas sensor amperometrically; said gas sensor comprising at least one electrochemical measuring cell, a measurement signal of the at least one electrochemical measuring cell determining the concentration of the gas component, the at least one electrochemical measuring cell including a first electrode and at least one additional electrode, wherein at least one of the first electrode and the at least one additional electrode is applied to a solid electrolyte made of ZrO 2 , which is partially or fully stabilized by Y 2 O 3 , at least one of the first electrode and the at least one additional electrode including a material that at least catalytically decomposes a nitrogen oxide; wherein the material includes a lanthanum-containing perovskite having the composition La 1−x Sr x Co 1−y Cu y O 3−δ; and wherein the first electrode and the at least one additional electrode are interconnected as a pump cell; and a measured pump current measured by the device connected to the pump cell includes a measure of a concentration of the nitrogen oxide present in the gas mixture.