Ngk Insulators, Inc.

Kouji Tagawa

Kunihiko Nakagaki

Yoshio Suzuki

A gas sensor contains a sensor element for detecting the concentration of a particular gas component in a measurement gas and a housing for supporting the sensor element inside, and the sensor element has a rectangular solid structure of a solid electrolyte body containing a ceramic material. In the gas sensor, four edges of the solid electrolyte body are beveled over the entire length thereof to form eleventh to fourteenth chamfered portions corresponding to the four edges.

Gas sensor

A solid electrolyte body is placed on and fixed to an upper plate of a press jig such that a major surface (an upper surface) of the solid electrolyte body faces one major surface of a guide plate having an open space. The upper plate is rotated by a transfer mechanism to incline the solid electrolyte body in one direction, and the inclined solid electrolyte body is moved toward the other major surface of the guide plate such that a first edge of the solid electrolyte body protrudes from the open space. Then, a cutter is slid along the other major surface, so that the first edge is chamfered to form a first chamfered portion.

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Nagoya, Japan

Kouji Tagawa