Electricity: measuring and testing – Magnetic – Fluid material examination
Patent
1998-03-27
2000-04-18
Patidar, Jay
Electricity: measuring and testing
Magnetic
Fluid material examination
73 6142, 73 5307, G01R 3312, G01N 2774
Patent
active
060519703
ABSTRACT:
The magnetic or conductive properties of a test fluid, or of particles within a test fluid, are measured by an apparatus comprising a solenoidal coil (1a), a magnetic field carrying means (23) disposed radially outside the solenoidal coil, a tubular electrostatic screen (22) disposed radially within the solenoidal coil and radially outside a sample detecting volume, the test fluid being disposed in use within the sample detecting volume and separated radially from the innermost surface of the electrostatic screen by an air gap (18). The solenoidal coil is energised in use, and sensing means is provided for sensing the impedance of the solenoidal coil.
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D. A. Minnot and A. J. Parris on "Non-intrusive, low-frequency diagnostic of positive-glow plasma.", The institute of physics, vol. II, 1978 (No Date available).
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