From Dan Baker on Che Bella, a Tayana 37.

These are photos of my water tank installation and the Acu-Gage
monitoring system that I installed.  

Not shown is the fuel tank
monitor.  
The, aluminum tape, capacitive? sensors work only on 
fiberglas or plastic tanks.  
The iron fuel tank requires a rigid 
coaxial sensor that goes into the tank through a hole in the flange. 
It works on the same electric principle as the tape sensors.

When I removed my SS 100 gal tank from the bilge (it was leaking), 
I replaced it with two stock Ronco roto-molded tanks of 30 and 40 gal
capacity.  I am adding a water maker, so I hope that the loss of 
capacity will not be important.



AftWaterTankSensor: 
The sensors consist of two aluminum strips of tape, placed parallel
to each other on the side or end of the tank.  The monitor reads the 
capacitance between the two strips.  I don't know what frequency it 
uses.  
This view is from above looking slightly aft, before the 
tank supports were installed.  
The handwritten 'MANUAL' refers to 
the water pickup for my manual sink pumps.


FwdWaterTankSensor: 
Looking aft at the forward end of the forward tank.



HoldingTankSensor: 
I think that I could only have preped and installed these sensors 
with the water tank out.  Otherwise it would have been too tight. 
These sensors work.  The dealer was a little worried that there
would be some metal in the tank that would mess up the readings.



Tank&SolarPanelMonitor: 
These are installed on the bulkhead next to the chart table and 
just under the circuit breaker panel (on my boat).  You cycle the 
acu-gage monitor between tanks to see the LCD readout for each one.
There is a audible warning (factory set) for either high or low.
The other panel is my Solar Panel charge controller panel.



WaterTanksLkngAft: 
The two new Ronco water tanks.  They don't fit exactly into the
space, but good enough for me.  I haven''t finished with the braces 
yet.  These two stock tanks are much cheaper than having custom 
roto-molded tanks made and even cheaper than custom welded tanks.
I think that roto-molded is supposed to be stronger than welded.