Hi Dave,

I'm pretty sure that gas does not conduct since conduction in liquids
requires ions in the liquid and gas should have very few ions.

What conditions does this have to work under? Does it have to work even if
the tank is not level? Does it have to deal with "sloshing"? I'm pretty
sure that the general consensus of this list (based on previous similar
threads) is that float sensing is the best and simplest way, although
weighing the tank might also be a workable solution.

Sean

At 09:16 PM 9/20/01 -0700, you wrote:
>Hello,
>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?
>
>Thanks,
>Dave
>
>PS: I will be putting some gas in a container and checking the resistance w/
>a multimeter to test it myself, but there might be a better solution.
>
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