Fluid handling – Self-proportioning or correlating systems – Mixture condition maintaining or sensing
Patent
1991-04-30
1993-04-13
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Mixture condition maintaining or sensing
73438, G05D 1106
Patent
active
052013375
ABSTRACT:
A specific gravity control apparatus 200 is disclosed which uses a plurality of electrodes 202, 204 and 206 to measure the height of a control liquid within a leg 8 to provide enhanced control of the specific gravity of the solution S. In a specific gravity control apparatus 250, a flexible diaphragm 254 isolates the solution from a control fluid. This permits a nonconductive solution to be maintained at a specific gravity by the apparatus using at least one electrode to measure the level of the control liquid which can be conductive.
REFERENCES:
patent: 3690184 (1972-09-01), Chadenson
patent: 3848618 (1974-11-01), Royse
patent: 4398554 (1983-08-01), Kondo
Nilson Robert G.
Royse Manufacturing Company, Inc.
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