Adjusting transducer frequency without ceasing fluid flow...

Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy

Reexamination Certificate

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C702S045000

Reexamination Certificate

active

07966893

ABSTRACT:
A method comprises, without ceasing flow of fluid through a flow meter, transmitting an ultrasonic signal of a first frequency through the fluid, adjusting the first frequency to a second frequency, and transmitting another ultrasonic signal of the second frequency through the fluid.

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International Application No. PCT/US2010/036134, Search Report and Written Opinion dated Dec. 24, 2010, 10 pages.

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