Abstract: The method of making a wide range oxygen sensor of the present invention enables ease of handling and processing, particularly in a mass production environment. This process comprises forming planar composite elements of the sensor where the elements are individually laminated. These laminated composites are easily handled and readily stacked. Furthermore, electrodes and electrode leads can be readily deposited on the laminated composites, across the intersection of the various materials forming the composite. After deposition of the electrodes, leads, and a heater, the elements are stacked accordingly and laminated to produce the oxygen sensor.

Abstract: Disclosed herein is a planar exhaust gas sensor for sensing the partial pressure of a gas in an exhaust. The sensing element has a modified, non-rectangular overall geometry. A terminal end of the element, onto which external sensor circuits can be attached, has a larger width than a sensor end of the element, in which is located the sensing cell. The reduced size of the sensor end of the element relative allows for more rapid attainment of operating temperature and lower energy consumption.

Abstract: Anatase titania is used as the sensitive ceramic for sensing the amount of carbon monoxide and hydrogen in mixed gasses where the changes in electric current characteristics passing through such ceramic when it is exposed to such gases is used to determine the amount of carbon monoxide and hydrogen present. Such sensor is made selective to hydrogen when alumina is included in the ceramic and to carbon monoxide when yttria is included. Additions of a catalytic metal particularly iron or palladium is beneficial to the anatase titania-yttria ceramic in its selective sensing of carbon monoxide.