GAS SENSOR

摘要

A gas sensor including: a detection element extending in an axial direction; a tubular metal shell surrounding a periphery of the detection element; and a powder-charged layer disposed between an outer surface of the detection element and an inner surface of the metal shell such that the powder-charged layer is in direct contact with the inner surface of the metal shell. The metal shell has a groove having an opening formed on an outer surface of the metal shell in a circumferential direction thereof, and in the axial direction, one-half or more of the opening is located between a center portion that is a center of the powder-charged layer and a front end, in the axial direction, of the powder-charged layer.

主权项

1. A gas sensor comprising:
a detection element extending in an axial direction and having, at a front side in the axial direction, a detection portion for detecting a concentration of a specific gas; a tubular metal shell surrounding a periphery of the detection element; and a powder-charged layer disposed between an outer surface of the detection element and an inner surface of the metal shell such that the powder-charged layer is in direct contact with the inner surface of the metal shell, wherein the metal shell has a groove having an opening formed on an outer surface of the metal shell in a circumferential direction thereof, in the axial direction, one-half or more of the opening is located between a center portion that is a center of the powder-charged layer and a front end, in the axial direction, of the powder-charged layer.