> I'm trying to make a simple fuel level indicator for a fuel tank.  I only
> need to be able to sense a few levels (i.e. Full, ~1/3 full, Near Empty).
> I'm thinking of having two wires (or other electrical contact)
actually -in-
> the gas, and using the fuel to "close the switch".  I'm pretty sure this
> would work for water, but I don't know if the gas will be able to conduct
> electricity well enough.  There is also the ignition issue, but at the
> voltages I'd use it shouldn't matter.  I will be using 94 Octane gasoline
> for my purposes.
>
> Does anyone have any idea if this would work, or possibly have another
> suggestion?

I don't know, but if I needed to I'd stick ohm meter probes into a glass of
gasoline.  I would think that these kinds of hydrocarbons don't conduct
electricity well for lack of ions, but I have no idea what the effect is
after all the additives.  But again, it seems like finding out for yourself
is quicker and more reliable than asking the list.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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