We describe the use of a differential transformer to detect the position of the buoy in a magnetic densimeter, an instrument for precise measurement of fluid densities. This detector can be used in cases where the buoy is not visible and it can be assembled from commercial electronic components.

Topics
Electronic devices, Linear variable differential transformers, Measuring instruments
1.
E. D.
Adams
 and
J. M.
Goodkind
,
Cryogenics
3
,
83
(
1962
).
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2.
The leak detector sensitivity was 10−10 cm3 sec−1 STP.
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© 1974 The American Institute of Physics.
1974
The American Institute of Physics
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