US PATENT SUBCLASS 204 / 424
.~.~.~.~ Gas sample sensor

Current as of: June, 1999
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204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

193  DF  APPARATUS {5}
194  DF  .~ Electrolytic {11}
400  DF  .~.~ Analysis and testing {20}
421  DF  .~.~.~ Solid electrolyte {2}
424.~.~.~.~ Gas sample sensor {3}
425  DF  .~.~.~.~.~> With impressed current means
426  DF  .~.~.~.~.~> Planar electrode surface
427  DF  .~.~.~.~.~> With gas reference material {1}

DEFINITION

Classification: 204/424

Gas sample sensor:

(under subclass 421) Apparatus in which the primary component of the sample is gaseous.

(1) Note. This subclass includes solid electrolyte gas sensors in which the partial pressure of the reference gas is provided by a solid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

422, for apparatus sensing dissolved gas in a liquid sample.