Method and apparatus for ultrasonic measurement of a physical parameter
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United States of America Patent
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Apr 8, 1986
Grant Date -
N/A
app pub date -
May 15, 1984
filing date -
Sep 15, 1982
priority date (Note) -
Expired
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Abstract
A parameter such as the depth (d) of a liquid (12) in a tank (10) is measured by use of an ultrasonic transducer (14) outside the tank (10). This is possible by choosing the ultrasonic frequency and the thickness of the tank wall such that a defined relationship is satisfied.
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