Patent ID: 6270639
Filing Date: 2001-08-07
Classification: G01N

Abstract:
An electrochemical sensor for determining a gas concentration of a measuring gas, said sensor having a layered design, comprising:an electrochemical pump cell having a first electrolyte body, a first electrode and a second electrode, the first electrode being disposed on the first electrolyte body, the first electrolyte body including a pump gas chamber which is connected via a gas supply opening to a measuring gas chamber, the second electrode being disposed in the pump gas chamber; andan electrochemical sensor cell having a second electrolyte body, a third electrode and a fourth electrode, the third electrode being disposed in the pump gas chamber;wherein a first lead electrically contacts the first electrode, a second lead electrically contacts the second and the third electrodes, and the fourth electrode has a third lead for an electrical contact, wherein the second lead lies in a plane of stratification between the first lead and the third lead, and wherein the first lead is capacitively decoupled from the third lead by an electron-conducting layer, the electron-conducting layer being disposed in a plane of stratification between the first lead and the third lead, and wherein the width of the electron-conducting layer substantially corresponds to the width of the electrochemical sensor.