Measuring sensor

Details Measuring sensor Measuring sensor

2011-08-16

2011-08-16

Wilkins, III, Harry D (Department: 1723)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S424000, C204S427000, C204S428000

Reexamination Certificate

active

07998327

ABSTRACT:
A measuring sensor is described for determining a physical property of a measured gas, especially for determining the oxygen concentration or the pollutant concentration in the exhaust gas of internal combustion engines, which has a sensor element that is exposable to the measured gas which is at least partially coated with a protective layer that protects against harmful components in the measured gas. In order to achieve producing a “contamination protection”, that is cost-effective from a manufacturing technology point of view, particularly against silicon compounds and phosphorus compounds, the protective layer (26) is made of highly active γ- or δ-aluminum oxide (Al2O3) having additives of compounds of the alkaline metals group, the alkaline earths group, the IV B subgroup or the lanthanides group.

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