Patent ID: 6419808
Filing Date: 2002-07-16
Classification: G01N

Abstract:
A hydrocarbon sensor of a current-detecting type comprising:a solid electrolyte substrate formed of a proton-oxide ion mixed conductor, said substrate having a first major surface and a second major surface; an anode attached on the first major surface of said substrate; a cathode attached on the second major surface of said substrate, such that the cathode is opposed to the anode; and an external constant-voltage power source being operable to apply a constant voltage across, and measure a current flowing between, the anode and the cathode; wherein the anode and the cathode are connected in series to the external constant-voltage power source; and wherein the cathode is formed of an alloyed layer containing Al and one or more of transition metals in Groups 3 to 12 in the Periodic Table.