Patent ID: 7083710

Claim:
A gas sensor, comprising: a sintered ceramic laminate body including one of a structured layer and a structured layer arrangement, within which a reference air channel is arranged, the one of the structured layer and the structured layer arrangement being produced by a printing technology, and the reference air channel including a bordering wall; an electrically insulated electric resistance heater embedded in the laminate on one side of the laminate; an electrode arrangement arranged on another side of the laminate, the electrode arrangement including at least one reference electrode arranged inside the bordering wall of the reference air channel, the at least one reference electrode being gas permeable in at least selected portions, the electrode arrangement further including a Nernst electrode operable to be acted upon by a gas to be sensed, the Nernst electrode being gas permeable in at least selected portions; and a solid electrolyte layer separating the Nernst electrode from the at least one reference electrode, the solid electrolyte layer being conductive and permeable to ions, wherein the reference air channel includes mouths arranged in a fan like pattern, the mouths extending outwards towards at least one end of the one of the structured layer and the structured layer arrangement for admission of a reference air at the at least one end.