Oil Tank Level Meter - DIY Home Improvement, Remodeling ...

Some hifi stuff has linear potentiometers for volume controls, etc. These may be had for $10. Let's say the wiper travel is 2"

Then you need a two strong springs (e.g., disc springs from Grainger) and lever system out of wood/metal such that a full/empty tank gives you 2" of travel on the end of the lever. 275 gals of #2 fuel oil might weigh 2000# and the tank weight needs to be subtracted out, mentally or electronically.

Then for $20 in parts (excluding case) you get an analog or digital meter and a REF05 or equivalent bandgap voltage reference and a 9v battery or DC wall wart from Hosfelt or Allelectronics or Digi-key. You run wires upstairs such that the circuit is only powered when you want a reading.

I got a lot of free parts by putting a free ad in the company newspaper that said "Wanted: VCR/edger/TV/answering machine/exercise machine/tools that you consider not worth fixing."

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Last edited by Wuzzat?; Today at 08:25 PM.

Source: http://www.houserepairtalk.com/f33/oil-tank-level-meter-15526/

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