NOx gas sensor for automotive exhaust and air pollution monitoring

摘要

A NO_x gas sensor for measuring NO, NO₂ and NO_x gas content from automotive exhaust including a method for producing such a gas sensor. The NO_x gas sensor generally includes a substrate, and a plurality of electrodes preformed and located on one side of the substrate. A platinum heater is located the other and opposite side of the substrate. A coating of nano-crystalline powders of a semi-conducting oxide material can be located and configured on the plurality of electrodes preformed on the substrate, thereby forming a gas sensor for the detection of NO_x. The substrate may be composed of a ceramic material, glass, alumina and/or another type of high-melting material. The electrodes, along with the heater are preferably composed of platinum. The semi-conducting oxide material preferably comprises YMnO₃ or doped YMnO₃.