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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
 Last Updated on: Monday, August 18, 2008 04:18 PM

Fluid Level Monitor
CAPACITANCE TYPE LIQUID LEVEL MONITOR
This circuit was originally designed to monitor the level of liquid natural gas in a tank but it can be used to also measure almost any liquid. Two custom insulated metal tubes form a capacitor plate. The capacitance between the two tubes increases as the level of the liquid rises. The circuit converts an increase of capacitance into a positive voltage change. The circuit could be changed to handle almost any scale factor needed.

Click on Drawing Below to view PDF version of Schematic

Circuit Liquid Fuel Gauge Capacitance Probe Circuit designed by David A. Johnson, P.E.

Fluid Level Monitor

Master Schematic Category List - David A. Johnson, P.E.
 

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