NOX sensor structure includes a gas permeable non-conductive porous spinel or porous platinum layer

摘要

A NOx sensor structure comprises a selective oxygen ion conductive layer and a gas permeable non-conductive layer of porous spinel structure or of porous platinum. An Independent claim is also included for a NOx sensor measuring arrangement comprising the above structure on a cathode. Preferred Features: A layer (11), of material which is catalytically inert with respect to NOx, is applied onto the exhaust gas side of the oxygen ion conductive layer (1) by a thick film technique or by vapor deposition.