Lowell,
My buddy's A/S tanks have some sort of electrical connector on the valve
that a pigtail from the trailer connects to.

<<Jim>>

PS: if your auto-switchover valve is working correctly, I'm not sure that a
guage is necessary or even very useful in the real world. A nice gadget,
yes, but not really necessary. Remember the old VW Beetles? They didn't
have a gas guage at all, just a Reserve valve that you kicked with your
foot when the engine died. Motorcycles were the same for many years; just
don't forget to turn it off the Reserve position when you filled up!
<<grin>>
 

Lowell Lamb wrote:

> > Steve:
> > Do they have a provision for a gauge too? One can order steel tanks
> > with a level gauge in them, even in the new valve style. It is a
> > seperate hole, not in the valve like the old. Please check to see if
> > they can supply those at a good price. Thank you.
> >
> > Melvin
>
> I haven't asked a dumb question all day so...
>
> How do these 'level' gauges sense? I glanced over my tanks this
> weekend and did not see any extra wiring or tubing or anything
> that would be used to sense levels, yet my needles bounce off
> the "Full" stops. Maybe they're just hot-wired to the switch?
>
> Lowell