Liquid level gauge and specific gravity calibration therefor

Details Liquid level gauge and specific gravity calibration therefor Liquid level gauge and specific gravity calibration therefor

G - Physics

01

F

G01F 25/00 (2006.01) G01F 23/30 (2006.01)

Patent

CA 2412405

A battery-powered liquid level gauge includes a tapped voltage divider extending into a liquid-containing vessel and including vertically staggered reed switches at the tap points magnetically coupled to a float member which rises and falls with the level of the liquid and is coupled to an LCD display. The batteries, the display and calibration circuitry are all disposed in a housing mounted on the outside of the vessel. The calibration circuitry includes a first zero set potentiometer in series with a second specific gravity adjustment potentiometer. The zero level is set with the first potentiometer based on a maximum specific gravity and then adjusted for lower specific gravities using the second potentiometer so that the original zero setting need not be changed.

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