US PATENT SUBCLASS 324 / 632
.~.~ Using particular field coupling type (e.g., fringing field)

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

600  DF  IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS {8}
629  DF  .~ Distributive type parameters {6}
632.~.~ Using particular field coupling type (e.g., fringing field)

DEFINITION

Classification: 324/632

Using particular field coupling type (e.g., fringing field):

(under subclass 629) Subject matter wherein a sensor located in close proximity to a substance under test, produces an electric field which links or couples the substance under test to the sensor.

(1) Note. The substance under test typically influences the propagation characteristics of the testing sensor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

687+, for fringing field coupling type sensing structures in lumped capacitive configurations.

688, for use of a guard electrode to improve sensing.