Installation and method for determining the level and density of

Details Installation and method for determining the level and density of Installation and method for determining the level and density of

1998-05-21

1999-09-21

Williams, Hezron

Measuring and testing

Liquid level or depth gauge

Hydrostatic pressure type

73301, 73439, G01F 2300, G01N 900

Patent

active

059539542

ABSTRACT:
An installation and method for determining the level and density of a liquid in a tank. A reference probe leads into the tank, above the liquid. A single bubble probe is connected by a valve to the reference probe. The bubble probe extends into the tank and has a widened section disposed in the liquid. Compressed air is injected into the reference probe and the bubble probe. In an initial state, the valve is opened and there is no pressure difference between the reference probe and the bubble probe. The valve is then closed and the pressure difference between the reference probe and the bubble probe is measured. The level and density of the liquid is determined from measured values of the pressure difference.

REFERENCES:
patent: 3680579 (1972-08-01), Hisada et al.
patent: 4215574 (1980-08-01), Godeux
patent: 4422327 (1983-12-01), Anderson
patent: 4567761 (1986-02-01), Fajeau
patent: 4711127 (1987-12-01), Hafner
patent: 5163324 (1992-11-01), Stewart
patent: 5406828 (1995-04-01), Hunter et al.
patent: 5517869 (1996-05-01), Vories
Patent Abstracts of Japan, vol. 017, No. 654 (P-1653), Dec. 3, 1993 & JP 05 215660 A (Hitachi Ltd;Others:01), Aug. 24, 1993, Figure 1.
Cousins T: "Fluid Density Measurement"/Measurement and Control, vol. 25, No. 10, Dec. 1992, pp. 292-296, XP000322332, * p. 293, column 1, line 59-column 2, line 21; figure 1.

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