US PATENT SUBCLASS 374 / 133
.~.~.~ Ambient temperature compensated (e.g., dummy sensor)

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}
133.~.~.~ Ambient temperature compensated (e.g., dummy sensor)

DEFINITION

Classification: 374/133

Ambient temperature compensated (e.g., dummy sensor):

(under subclass 121) Subject matter having an arrangement to eliminate any effects caused by the temperature of the surroundings of the radiation sensor.

(1) Note. Included herein are arrangements with an additional radiation sensor not exposed to the radiation to cancel the temperature effects on the radiation receiving sensor.