LEVEL MEASUREMENT USING AN INCLINED ARRAY OF SOURCES OF IONISING RADIATION
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United States of America Patent
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Aug 9, 2017
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Feb 7, 2008
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A method and apparatus for determining the location of a substantially horizontal fluid interface within a vessel are provided. The apparatus has a generally linear source array comprising a plurality of sources of penetrating radiation and a generally linear detector array comprising a plurality of radiation detectors capable of detecting radiation emitted by the sources. The source and detector arrays are located so that radiation emitted from each source can follow a linear path from the source, through the vessel and material to the detectors. Comparing the amount of radiation received by at least two of the detectors from a source provides an indication of the relative density of the material through which radiation has passed. The linear axes of the source and detector array are oriented with respect to the horizontal interface such that the linear axes intersect the plane of the interface at an angle between 10 and 80 degrees.
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