Quote:
Originally Posted by Skip 500
There is a float inside the tank and there is a small magnet in the top of the unit that is attached to the tank. The gauge actually screws into the top of this and reads the level from the magnet.
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to add to this there is actually a "gas gauge" (no pun intended) on the tank that shows E to F. there is a small potentiometer attached to the needle that varies resistance to the inside digital gauge.