The Heavy-Duty Fuel Level Gauge (E-1/2-F) is designed for reliable fuel monitoring. This gauge operates by sending a low amperage current through the gauge's meter to ground via a sending unit with variable resistance. As the resistance changes due to various factors like pressure and temperature, the current flow to ground changes, causing the meter to deflect and accurately display the fuel level.
Faria Beede Instruments GP0707B Heavy-Duty Fuel Level Gauge (E-1/2-F) - Black Case of 24