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1. (WO2017183229) GAS SENSOR

Pub. No.:    WO/2017/183229    International Application No.:    PCT/JP2016/085769
Publication Date: Fri Oct 27 01:59:59 CEST 2017 International Filing Date: Fri Dec 02 00:59:59 CET 2016
IPC: G01N 27/409
Applicants: NGK SPARK PLUG CO., LTD.
Inventors: YONEZU Kunihiko
米津 邦彦
OBA Takehiro
大場 健弘
The purpose of the present invention is to provide a gas sensor that has a base part and flange part made from a polymer material and can be made to be smaller. Provided is a gas sensor 200 provided with: a gas sensor element 10 having a detection unit 11; a main metal fitting 50 for holding the gas sensor element; a base part 120 that is made from a polymer material, and is connected to the rear-end side of the main metal fitting directly or via another member 110 and covers the rear-end side of the gas sensor element; a flange part 121 that integrally extends from the base part in the radial direction and is provided with an attachment hole 121h for attachment to an object to be attached to 300; and a cylindrical metallic collar 80 that is fixed to the attachment hole and in which a connection member 310 for connecting to the object to be attached is inserted. The leading-end-facing surface 80a of the collar protrudes further toward the leading end side than the leading-end-facing surface 121a of the flange part.