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Nuclear densitometers are valued for their non-intrusive ability to measure density of material within piping and vessels. Safety concerns, regulations and paperwork required for their installation are the main obstacles impeding a wider spread use. With the effort needed to install, maintaining good calibration can lead to a better value over their lifetime. A nuclear densitometer measurement is can be skewed by several factors including product moisture and temperature. Also, details of the installation can limit the ability to provide a controlled reference material to calibrate the instrument. . This paper addresses methods and procedures for developing a densitometer calibration standard that is non in-situ and independent of product moisture and temperature.
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