How fuel gauge work ?
Fuel gauge is a simple device, consisting of 2 major parts:
- Float in the fuel tank
- Level indicator in the dashboard
The float in the fuel tank is attached to a resistor which is connected to battery and level indicator. Depending upon the level of fuel in the tank the resistance varies. This will makes the current flow fluctuations to the dashboard line.
The indicator is calibrated depending upon the fuel level and current passing. Thus when the tank is full the float will be on the top of tank and resistor creates least resistance and hence high amount of current passes to the indicator which will makes the needle to deflect more and indicate the F and when the fuel level in the tank is low the float will be on the low level making more resistance to the flow of current to the dashboard and hence the indicator will drops to E
** content is limited to my knowledge and comments are most welcome
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