Patent ID: 9696274
Date: 2017-07-04
CPC Classifications: G01N

Claim:
1. A gas sensor element comprising: a plate-shaped ceramic solid electrolyte member having a pair of electrodes formed primarily of a metal and disposed on the solid electrolyte member; and a ceramic dense member layered on the solid electrolyte member and forming at least a portion of a wall surface of a hollow cavity into which gas to be measured or the atmosphere is introduced, the gas sensor element being adapted to detect a particular gas contained in the gas to be measured, wherein one of the pair of electrodes is a cavity side electrode disposed to face the hollow cavity; the cavity side electrode is spaced from the wall surface of the hollow cavity; and at least one ceramic porous member is provided in the hollow cavity, the ceramic porous member partially covering the cavity side electrode such that the cavity side electrode is partially exposed to the hollow cavity and extending from a position on the cavity side electrode, beyond an end or peripheral edge portion of the cavity side electrode, to a position on a surface of the solid electrolyte member exposed to the hollow cavity.