What is this?

[Greensam]

Does anyone know what this is? I found it wired up inside my fuel tank. There are no markings on it at all, it is sealed and it has what seems to be a coil of heavy gauge wire inside of it.

 

[Chester]

It's to remove water from the gas tank.
http://www.watermagnet.com/
http://www.diesel-fuels.com/water-contamination/water-eliminator.php

Chester

 

[Greensam]

Interesting, thanks Chester