GAS SENSOR

摘要

In a gas sensor, a powder compact seals a void space between an inner peripheral surface of metal-made main hardware and a sensor element, and the inner peripheral surface has arithmetic average roughness of 0.5 to 5 μm. The gas sensor includes supporters, which are arranged in a penetration hole of the main hardware, which allow the sensor element to penetrate therethrough, and which press the powder compact in sandwiching relation from both sides in an axial direction. A surface of at least one of the supporters has the arithmetic average roughness of not more than 0.5 μm.

主权项

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; and a powder compact arranged in the penetration hole and filled between an inner peripheral surface of the penetration hole and the sensor element, wherein 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, has an arithmetic average roughness Ra of 0.5 to 5 μm.