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12-31-2008, 09:23 AM
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Registered User
Join Date: Nov 2007
Location: Baltimore, Ohio
Posts: 65
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Re: gauging interest
This may be way off, but waste holding tanks in campers and RV's have sensors that tell you if their full, 1/2 way of empty. They typically use 3 lights and I don't know how the sensors would hold up to gasoline compared to waste water. Just a thought for you.
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