Multilayer ceramic NO x gas sensor device

Details Multilayer ceramic NO x gas sensor device Multilayer ceramic NO x gas sensor device

2005-07-14

2009-11-03

Olsen, Kaj K (Department: 1795)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C205S781000, C205S785000

Reexamination Certificate

active

07611612

ABSTRACT:
A mixed potential NOxsensor apparatus for measuring the total NOxconcentration in a gas stream is disclosed. The NOxsensing apparatus comprises a multilayer ceramic structure with electrodes for sensing both oxygen and NOxgas concentrations and includes screen-printed metalized patterns that function to heat the ceramic sensing element to the proper temperature for optimum performance. This design may provide advantages over the existing technology by miniaturizing the sensing element to provide potentially faster sensor light off times and thereby reduce undesired exhaust gas emissions. By incorporating the heating source within the ceramic sensing structure, the time to reach the temperature of operation is shortened, and thermal gradients and stresses are minimized. These improvements may provide increased sensor performance, reliability, and lifetime.

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