Kiss Kiss has three water tanks (port and starboard cabin, and bow), a small holding tank above the head, and a factory fuel tank (modified and renovated in an earlier post).
I wanted to know the fuel level, and the water level in the two cabin water tanks. The bow tank, due to my insecurities over having that much mass at the bow, has been taken offline.
The port water tank is factory original, with an electronic level sender installed. The starboard tank is a poly replacement for the original holding tank, and does not have a sender. Because the two tanks are linked when both valves are opened midships, they will self-level...therefore only one sender is required (and some math during calibration).
The fuel tank also has an electronic sender.
I have a BEP multi-tank monitor which will keep track of 3 tanks simultaneously once properly calibrated.
Installation required running 12v to the extremely low-draw senders, fusing and grounding them, then running the sender leads to the control unit, which I switched and fused and installed adjacent my chartplotter at the navigation table. I have not calibrated the units yet, because the instructions insist that you calculate the fuel/water volume, divide into 5 parts, then empty the tank, fill in 5 equal amounts while calibrating (a bit of a pain).
I am thinking whether the same couldn't be acheived by pulling the sender out of the tank, measuring the long sensor rod and dividing it into 5 parts with a marker, then dipping it down into the full tank mark-mark...not sure this makes sense with a non-rectangular/non-flat tank...geometry....
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