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1. (WO2018160606) MIXED-POTENTIAL-TYPE-SENSOR

Pub. No.:    WO/2018/160606    International Application No.:    PCT/US2018/020066
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Thu Mar 01 00:59:59 CET 2018
IPC: G01N 27/407
G01N 27/419
G01N 27/36
Applicants: NGK SPARK PLUG CO., LTD.
SPIROSURE, INC.
Inventors: OMORI, Koji
TAKAKURA, Masahiro
SSENYANGE, Solomon
LEARD, Ryan
Title: MIXED-POTENTIAL-TYPE-SENSOR
Abstract:
A mixed-potential-type sensor for measuring the concentration of nitrogen oxide contained in a gas under measurement including a solid electrolyte layer having oxygen-ion conductivity, and a pair of porous electrodes formed thereon. One electrode is covered with a first layer containing tungsten oxide as a main component. The other electrode is covered with a gas impermeable second layer. The second layer is in contact with the other electrode without intervention of the tungsten oxide component. The solid electrolyte layer is porous and allows the gas under measurement to permeate from an externally exposed surface of the solid electrolyte layer to the other electrode. The concentration of the nitrogen oxide is detected from a potential difference developed between the electrodes.