Patent ID: 9494548
Filing Date: 2016-11-15
CPC Classification: G01N

Claim Text:
1. A gas sensor comprising: a detection element, the detection element including a solid electrolyte body having a plate form, and a pair of electrodes formed on opposite sides of the solid electrolyte body, one of the paired electrodes being a sensing electrode which is exposed to a gas-to-be-measured, and the other electrode being a reference electrode which functions as an oxygen reference electrode, wherein: the reference electrode is connected to a porous reference electrode lead extending along a surface of the solid electrolyte body; the reference electrode lead contains a noble metal as a main component and also contains a ceramic material; the reference electrode lead has a specific resistance lower than that of the reference electrode; and the ceramic material has, in a sintered state, a mean primary grain size greater than that of the noble metal.