The Mechanism of Fuel Gauge
Mechanism of Fuel Gauge

All vehicles need fuel and the ones which run on gasoline and oil definitely need good fuel gauge. These days vehicles have digital monitor but old vehicles have gauge with needle. These are interesting things which work with electro-mechanical parts. Fuel Gauge is one of the most important indicator in a vehicle. We can assess the safe speed of vehicle while driving but we can’t know the fuel situation so we should make sure it is always in working condition.

Fuel gauges operate on electrical resistance, using a float with an attached metallic rod as the internal ‘needle’. A wiper conducts electrical current from the rod to the gauge and the more of the rod that’s exposed, the less conductive it becomes, which in turn reduces the fuel gauge level. This older system is effective but works on a relative scale; you’re never sure just how close to empty the tank is.

Modern fuel gauges work off the same principle but add a microprocessor to read the resistance in the tank. They can also compensate for the shape of the tank, calculating the volume of fuel remaining far more accurately. Even better, the microprocessor can ‘dampen’ needle movement, meaning that your fuel gauge doesn’t swing wildly as you turn corners or climb hills, which sloshes the fuel in the tank, along with the float, exposing more of the rod.


Now days companies are manufacturing vehicles with digital speedometer and fuel gauge. These are much more accurate and suffer less from breaking down. These also don’t have chance of having broken dials . Due to this reason the petroleum dealers also can’t cheat the consumers.


Fuel Gauge Indication
Fuel Gauge Indication


We have seen many jokes and pictures on internet about people’s mistake while filling the fuel. The gas station may not have hose in both direction so you can look for the input before parking or stopping.

There will be a small arrow like pointer or sign near the indicator icon which actually indicates where the pump must be faced. The pump or station machine must be at the side indicated by the fuel gauge indicator.

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