BS and W measurement system

Details BS and W measurement system BS and W measurement system

1985-09-09

1986-09-30

Fisher, Richard V.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210 961, 210138, 73 611R, B01D 3300, B01D 3700

Patent

active

046145940

ABSTRACT:
The basic water and sediment (BS&W) system compares a wet stream to a dry stream of the same oil in two electrical capacitance cells. A numerical zero offset is employed in the comparison to compensate for voltage output differences between the cells. The dry cell builds a small increase in its inherent offset from the wet cell because of its lower flow rate, which buildup is swept away when the wet fluid is run through both cells at a higher flow rate to determine the zero offset. To cancel the zero offset, the present invention alternates the flow to the two cells so that each cell experiences the same sequence of events alternately.

REFERENCES:
patent: 3546926 (1970-12-01), Dunavent, Jr. et al.
patent: 4184952 (1980-01-01), Stewart
patent: 4401575 (1983-08-01), Stewart et al.
patent: 4492639 (1985-01-01), Stewart et al.
patent: 4510060 (1985-04-01), Stewart et al.

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