US PATENT SUBCLASS 374 / 127
.~.~.~ Having significant frequency limitation or relationship (e.g., peak, ratio)

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
120  DF  .~ In spaced noncontact relationship to specimen {3}
121  DF  .~.~ By thermally emitted radiation {11}
127.~.~.~ Having significant frequency limitation or relationship (e.g., peak, ratio)

DEFINITION

Classification: 374/127

Having significant frequency limitation or relationship (e.g., peak, ratio):

(under subclass 121) Subject matter including a particular feature of the frequency of the thermal radiation, or a portion thereof, sensed to perform the temperature determination.

(1) Note. The sensed parameter is often the intensity of the radiation at a given frequency.

(2) Note. Included herein are ratio pyrometer, devices determining the frequency of peak intensity, and devices having sensors with different frequency-intensity characteristics.

SEE OR SEARCH CLASS

356, Optics: Measuring and Testing,

45, for a plural color responsive optical pyrometer.