Patent ID: 8470147
Filing Date: 2013-06-25
Classification: G01N

Abstract:
1. A gas sensor, comprising: a first ionically conductive substrate including a zirconia based material and a second ionically conductive substrate including a zirconia based material; a first sensing electrode and a first reference electrode coupled to opposite sides of the first ionically conductive substrate and a second sensing electrode and a second reference electrode coupled to opposite sides of the second ionically conductive substrate; a first electrically insulating substrate assembly including magnesium aluminate spinel, the first electrically insulating substrate assembly including a first recess and a second recess spaced apart from the first recess along an axial direction of the sensor; a first heating coil and a separate second heating coil coupled to the first electrically insulating substrate assembly; a second electrically insulating substrate assembly including magnesium aluminate spinel; and a first resistance temperature detector and a separate second resistance temperature detector coupled to the second electrically insulating substrate assembly, wherein: