Gas sensor

Details Gas sensor Gas sensor

2004-03-24

2010-02-23

Michener, Jennifer K (Department: 1795)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S424000, C204S425000, C204S426000, C204S427000, C205S783500, C073S023310, C073S023320

Reexamination Certificate

active

07666286

ABSTRACT:
A gas sensor includes a first space for a measurement gas from a gas-introducing hole via a first diffusion rate-determining section, a main pumping means for controlling a partial pressure of oxygen in the measurement gas introduced into the first space to have a predetermined value, a second space for the measurement gas from the first space via a second diffusion rate-determining section, and a measuring pumping means for reducing or decomposing a NOx component in the measurement gas introduced from the second space via a third diffusion rate-determining section so that oxygen produced thereby is pumped out to detect a current generated by pumping out the oxygen. A ratio (Wc/We) between a width (We) of an end of a sensor element and a width (Wc) of the gas-introducing hole is not less than 0.3 and less than 0.7.

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