Patent ID: 9588078
Date: 2017-03-07
CPC Classifications: G01N

Claim:
1. A gas sensor comprising: a sensor element; a tubular member made of metal and having a penetration hole through which the sensor element penetrates in an axial direction; a powder compact arranged in the penetration hole and filled between an inner peripheral surface of the penetration hole and the sensor element; and a first member and a second member which press the powder compact in sandwiching relation from both sides in the axial direction, at least a portion of the inner peripheral surface of the penetration hole of the tubular member, the portion being contacted with the powder compact, having an arithmetic average roughness Ra of 0.5 to 5 μm, and a pressing surface of at least one of the first and second members, the pressing surface acting to press the powder compact, having an arithmetic average roughness Ra of not more than 0.5 μm.