Patent ID: 11733202

Abstract:
A gas sensor includes: a metal tubular body including a through hole allowing a sensor element to penetrate in an axial direction; and a powder compact being filled between an inner surface of the tubular body constituting the through hole and the sensor element, and sealing between both end portion sides of the sensor element. At least a range of a through hole inner surface to come into contact with the powder compact filled between the inner surface and the sensor element is a stripe-like recessed and projecting region in which projecting portions and recessed portions are alternately arranged in the axial direction and those portions extend along an inner circumferential direction of the tubular body. An interval between the projecting portions in the axial direction is 50 μm to 150 μm. The following expressions are satisfied, 0.3 μm≤Rz1≤10 μm, and Rz1/Rz2≥2.0.