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Old 09-02-2013, 05:23 PM   #4
City: Montgomery, TX
Country: USA
Vessel Name: Encore
Vessel Model: Whitby 42
Join Date: Feb 2012
Posts: 807
Sounds like a Tank Tender or something similar. There is a tube down inside each tank. You pump in air until all the fluid is displaced and the pressure reading is the head pressure of the fluid. Knowing the density of the fluid this translates to fluid level.

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