Patent ID: 6712945
Filing Date: 2004-03-30
Classification: G01N

Abstract:
An electrochemical sensor for determining at least one of a gas component and a gas concentration in a gas mixture, comprising:an ion-conducting solid electrolyte body; and a sensor element including at least one electrode arranged on the solid electrolyte body and exposed to a gas in at least some areas, wherein: the at least one electrode includes a first layer facing the solid electrolyte body and a second layer facing the gas, the second layer has a higher electron conductivity; and wherein the at least one electrode includes a ceramic component and a metallic component, and a first amount of the ceramic component and the metallic component in the first layer is different than a second amount of the ceramic component and the metallic component in the second layer, the metallic component of the at least one of the first layer and the second layer includes platinum, and the ceramic component of at least one of the first layer and the second layer includes ZrO2 stabilized with Y2O3 and wherein the electrode is connected via an electrode supply lead to a circuit located outside the sensor, the electrode and the electrode supply lead arranged in a gas space formed by the electrolyte body.