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The present invention relates to a sensor for detection of oxides of nitrogen forming part of a gas, including a substrate consisting of a solid electrolyte on which a conductive pattern is arranged which includes at least two parts forming an anode and a cathode, a current being produced in the sen

The present invention relates to a sensor for detection of oxides of nitrogen forming part of a gas, including a substrate consisting of a solid electrolyte on which a conductive pattern is arranged which includes at least two parts forming an anode and a cathode, a current being produced in the sensor in the presence of oxides of nitrogen and the anode and the cathode being connected to an external voltage source which is adapted to drive the current and to means for measuring the current, which constitutes a measure of the concentration of oxides of nitrogen in the gas. The sensor is adapted to generate the current by means of a transport of oxygen ions in the sensor which essentially originates from oxides of nitrogen being part of the gas, independently from the content of oxygen in the gas.

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[ What is claimed is:] [10.] A method of using a sensor comprising a substrate which comprises a solid electrolyte, said electrolyte including a conductive pattern arranged thereon, said conductive pattern including at least two portions comprising an anode and a cathode comprising a metal which is

[ What is claimed is:] [10.] A method of using a sensor comprising a substrate which comprises a solid electrolyte, said electrolyte including a conductive pattern arranged thereon, said conductive pattern including at least two portions comprising an anode and a cathode comprising a metal which is highly selective for the dissociation of nitrogen oxides as compared to oxygen, whereby a current is generated by the transport of oxygen ions dissociated from said nitrogen oxides, said method comprising measuring the concentration of said nitrogen oxides in a gas independently from the oxygen content in said gas.