Density measuring apparatus

Details Density measuring apparatus Density measuring apparatus

1990-02-09

1993-09-28

Williams, Hezron E.

Measuring and testing

Specific gravity or density of liquid or solid

Float operated indicator

73452, G01N 910

Patent

active

052478343

ABSTRACT:
A simple and mechanically-rugged calculation or monitoring of the density of fluids, particularly of fuels serving the purpose of driving an internal-combustion engine, provides that a buoyant member is immersed into the fluid under examination, the buoyancy thereof being balanced out via a load applied with a spring. A capacitor that is dependent on the buoyancy and, therefore, on the density of the fluid under examination is formed between the buoyant member and the housing that holds the spring and is filled with the fluid under examination, the capacitor being monitored via a circuit arrangement.

REFERENCES:
patent: 3688588 (1972-09-01), Hill
patent: 3726128 (1973-04-01), Fiet
patent: 4131019 (1978-12-01), Krauss
patent: 4134301 (1979-01-01), Erwin, Jr.
patent: 4357834 (1982-11-01), Kimura
patent: 4428232 (1984-01-01), Tanaka et al.
patent: 4454761 (1984-06-01), Coulange
patent: 4476723 (1984-10-01), Bryne
patent: 4785669 (1988-11-01), Benson et al.
patent: 5001927 (1991-03-01), LaCava et al.
patent: 5111698 (1992-05-01), Banholzer et al.
Haynes et al., "Differential capacitance sensor as position detector for a magnetic suspension densimeter", Rev. Sci. Instrum. 50(9), Sep. 1979 pp. 1154-1155.

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