Patent ID: 6241865
Filing Date: 2001-06-05
Classification: G01N

Abstract:
A sensor for the measurement of gas concentrations in a gas mixture comprising:a ceramic sensor tube that is closed at one end and has an outer surface which consists at least partially of a solid electrolyte material;at least one sensor contact;at least one heating contact on an electrically insulating layer applied to the solid electrolyte material, wherein the heating contact does not cover the sensor contact; andan active heating surface that is rotationally symmetrical around the perimeter of the sensor tube, wherein the heating contact is arranged in a serpentine pattern that runs in a circumferential direction around the sensor tube, the serpentine pattern comprises segments running alternately in the axial direction and in the circumferential direction of the sensor tube and the width of the active heating surfaces that run in the axial direction being smaller than the width of the active heating surfaces that run in the circumferential direction.