Area flow meter with hall devices having magnetism-responsive su

Details Area flow meter with hall devices having magnetism-responsive su Area flow meter with hall devices having magnetism-responsive su

1994-12-15

1996-08-13

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Using differential pressure

7386158, G01R 33025

Patent

active

055445330

ABSTRACT:
In an area flow meter, float 22 made of material larger in specific gravity than a fluid being measured is movably disposed in vertical pipe 21. Magnet 23 in the float 22 has its north and south poles aligned vertically to produce magnetic-force lines 26 symmetrically with respect to its symmetry axis. Magnetism-gathering tapered element 27 made of a high-permeability material is configured to flare outwardly from its fixed end to its free end to have their fixed ends mounted on magnetism-responsive surfaces of magnetic sensors "A" which are at the same distance from the symmetry axis and disposed outside the pipe on a plane perpendicular to the axis. The flux caught by the elements 27 is gathered on the surfaces to boost only output sensitivity required for detection of the float in position.

REFERENCES:
patent: 3522731 (1970-08-01), Wilson
patent: 5186058 (1993-02-01), Lew
patent: 5187988 (1993-02-01), Dettmer et al.
patent: 5327789 (1994-07-01), Nijdam

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