Doug/Barry,
Why not use some of these GEMS electronic fluid level sensors.  They are
totally solid state.  They use an infra-red beam reflecting off a prism
type lense.  When submerged, the light beam is disbursed, when above the
liquid, the beam is reflected back to the IR receiver and a signal is
generated.  I put one in each of my wing tanks at the 6 gallon level as
a low fuel warning.  They are connected to two "Low Fuel" LED's on the
panel.

Mark S.

Mark and Doug,

Your suggestions make sense, however, in the attached picture, you will
see my wing with the leading edge fuel tank.  Of course the view is not
that good as it is from the aft, you can see the ribs separating the
main tank. I believe these are for stability and to keep the fuel from
sloshing too much in the tank. How would you apply your suggestions to
this scenario? I like both suggestions, the laser sensor and the
magnetic tube, but I am not sure that it will work in my situation.

Thanks,


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