Patent ID: 9689834
Date: 2017-06-27
CPC Classifications: G01N,Y02A

Claim:
1. A gas sensor comprising: a plate-shaped detecting element that extends in the direction of an axis and has a front end portion directed at an object measurement gas; a metal shell surrounding a periphery of the detecting element such that the front end portion and a rear end portion of the detecting element protrude therefrom; and a tubular member that accommodates the rear end portion of the detecting element, wherein the detecting element has a pair of principal surfaces and a pair of side surfaces which are adjacent to the pair of principal surfaces in a radial direction perpendicular to the direction of the axis, wherein a first chamfered portion is provided between at least a first principal surface of the pair of principal surfaces and a rear end surface of the detecting element, wherein an angle between a first axis ridgeline portion formed by the first principal surface and a first side surface that is one of the pair of side surfaces and extending in the direction of the axis, and a first width ridgeline formed by the first principal surface and the first chamfered portion and extending in a width direction is larger than 90° and less than 180°, wherein a plurality of electrode pads extending in the direction of the axis is provided on the first principal surface at the rear end portion of the detecting element, at least one of the plurality of electrode pads is disposed adjacent to a portion of the first axis ridgeline portion, and a first long side chamfered portion is provided extending between said first principal surface and said first side surface in the radial direction and extends in the direction of the axis, such that said first long side chamfered portion does not exist on the portion of the first axis ridgeline portion that is adjacent to the least one of the plurality of electrode pads and a length of the first long side chamfered portion is less than a length of the first axis ridgeline portion in the direction of the axis.