Arrangement and a method for measuring level, interface level and density profile of a fluid in tanks or containers
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United States of America Patent
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Apr 15, 2003
Grant Date -
N/A
app pub date -
Jun 1, 2000
filing date -
Sep 17, 1997
priority date (Note) -
Expired
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Abstract
The invention is an apparatus and method for measuring a level, an interface level, and/or a density profile of at least one fluid in a container (2, 3) with at least two nuclear radiation sources (9) vertically arranged at a predetermined distance from each other inside or both inside and outside the tank. A defector unit (11) is used and includes a scintillator rod (12) with photo multiplier tubes (13) at each end. Electronic means provides information on fluid level positions and radiation levels at different places along the scintillator rod (12) by measuring pulse amplitudes from the photo multiplier tube. The radiation is converted to electric pulses having an amplitude proportionate to the light intensity of the radiation at the actual position along the rod (12). A ratiometric calculation of the amplitude determines the position of the corresponding radiation quant.
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