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A new inductive detection for the magnetoviscometer
Author(s) -
Hermann W.,
Sobczak R.
Publication year - 1989
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1989.070370918
Subject(s) - spheres , electromagnetic coil , induction coil , electrical impedance , magnetic field , electromagnetic induction , acoustics , brass , materials science , physics , mechanics , electrical engineering , engineering , quantum mechanics , astronomy , copper , metallurgy
For a new magnetoviscometer with an inhomogeneous magnetic field to move iron spheres similar to the Stokes experiment, a nonoptical detection was developed. As a measuring principle the change of the impedance of a coil, penetrated by the sphere is used. The measuring principle is the change of impedance of an induction coil wrapped around the cell by the sphere. The measuring block, consisting of heating elements, detection coils, and a measuring cell is quite simple and therefore well suited for measuring under pressure. Since the proper cells are simply brass cylinders closed by a screw, they can be thrown away after the experiment (e.g., for network‐building polymers). Examples for said measurements are given.