In article , Ned Simmons
says...

I'd expect that fuel gages are designed along the lines of
the "intrinsically safe" sensors that are used in explosive
atmospheres in industrial settings. This is accomplished by
limiting the current, voltage and energy storage
(inductance, capacitance) in the device to a level that's
incapable of causing ignition.

Nope. They're just scratchy, sparky wires like he said.

Also they put dc brush motors in fuel tanks. Immersed in
gas to lubricate them. Scary but it works.

Jim


--
==================================================
please reply to:
JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com
==================================================