Patent ID: 8673128
Filing Date: 2014-03-18
Classification: G01N,H01G

Abstract:
1. A gas sensor element which is sensitive to a given component of a gas comprising: a cylindrical insulating ceramic member which has surfaces opposed to each other and a through hole formed therein; a solid electrolyte body which is disposed in the through hole of the cylindrical insulating ceramic member and works to conduct at least a given ion, the solid electrolyte body having a first major surface and a second major surface; a measuring electrode disposed on the first major surface of the solid electrolyte body to be exposed to the gas; a reference electrode disposed on the second major surface of the solid electrolyte body to be exposed to a reference gas; a heating element disposed on one of the opposed surfaces of the cylindrical insulating ceramic member on a same side as the second major surface of the solid electrolyte body in a radial direction of the cylindrical insulating ceramic member, the heating element working to activate the solid electrolyte body; and a hollow cylindrical ceramic member which has a closed end and defines therein a reference gas chamber into which the reference gas is admitted, the hollow cylindrical ceramic member also having formed in a peripheral surface thereof a window which communicates with the reference gas chamber, wherein the cylindrical insulating ceramic member is stacked on the hollow cylindrical ceramic member with the solid electrolyte body exposed to the reference gas chamber through the window, and wherein the heating member is interposed between the hollow cylindrical ceramic member and the cylindrical insulating ceramic member.