Patent ID: 7678329

Claim:
A NO x sensing device comprising: (i) at least two electrodes wherein both electrodes comprise the same conductive oxide material, at least one electrode is configured for sensing NO x gas, and both electrodes are exposed to the same sample gas, (ii) an oxygen-ion conducting material in bridging electrical communication with said electrodes, said device being configured to sense at least one chemical selected from the group consisting of NO and NO 2 when the device is biased at a selected electrical bias, and (iii) an electronics package including a means for measuring an electrical property between the first electrode and the second electrode, and an electrical biasing source for electrically biasing the sensing device, the electrical biasing source configured to produce a selected electrical bias between the first and second electrode, the electrical biasing source configured to produce the selected electrical bias, wherein the means for measuring an electrical property is selected from the group consisting of a voltmeter, an ammeter, and a combination thereof, and wherein the selected electrical bias is selected from the group consisting of electric current, voltage, and a combination thereof.