Patent ID: 8739604

Claim:
A gas sensor comprising: a gas sensing layer comprising at least one metal oxide compound and at least two dopant species, the said gas sensing layer being capable of detecting at least one analyte selected from the list comprising NO, NO 2 , NH 3 , H 2 O, and combinations thereof, in harsh environments; at least one electrode in communication with the said gas sensing layer; an adhesion layer, comprising a chemical element selected from the group consisting of Ti, Cr, and combinations thereof; and a response modification layer, consisting of at least one chemical element selected from the group consisting of Ti, Re, Ni, Ta, Nb, Mo, Zr, and combinations thereof, adjacent to the gas sensing layer and the adhesion layer; wherein said metal oxide is selected from the list of metal oxides consisting of W, Ta, and Nb; and wherein said dopant species are selected from the list of chemical elements consisting of Re, Ni, V, Ta, Nb, Mo, and Zr.