Capacitance fuel level sender 12" long, 3" bendable section is bewteen black mark and mounting flange, 1/4" OD, 12 or 24 VDC (28V MAX) input, 0-5 VDC output
Typical SAE mounting flange         Instructions
The nominal supply range is 11-28vdc.  The current is less that 30 milliamps (.03 amps).