Presented here is a description of a magnetic densimeter using an rf sensing coil. The coil is used to sense the position of a small buoy floating in a liquid whose density is to be determined. The instrument's electronics is completely composed of solid state components. The densimeter was tested by making a calibration run on a National Bureau of Standard's sucrose sample. It was found to be capable of making density measurements to better than 3 ppm.

1.
J. W.
Beams
and
A. M.
Clarke
,
Rev. Sci. Instrum.
33
,
750
(
1962
).
2.
J. P.
Senter
,
Rev. Sci. Instrum.
40
,
334
(
1969
).
3.
D. V. Ulrich, dissertation, University of Virginia, 1963.
4.
Standard sample 17, lot No. 6340, April 1963.
5.
Circular of the National Bureau of Standards, No. 19, Oct. 31, 1924.
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