One of the most important pieces of information given to us by the dashboard of a car or articulated lorry, or even of a boat or a self-propelled machine, is the amount of fuel in the vehicle's tank. Mont.El's fuel level sensors ensure constant and precise measurement, thanks to the company’s extensive construction experience and patents filed.
The sensor's output provides a variable resistance value depending on the fuel level when the contact slides on a suitable gold FR4 printed circuit board.
By ensuring the appropriate number and length of segments on the printed circuit board, it is possible to linearise the measurement, allowing the probe to adapt to any tank and type of instrument, whether analogue or digital.
The sensor's output also provides a normally open contact which closes to ground when the fuel level reaches the desired reserve level. Due to the internal shape and arrangement of the sensor (obstructions caused by the flanges and dimensions of the float), there are two "dark areas": one near the flange and one near the cap. These areas, corresponding to the "full" and "empty" levels, are indicated in the table of lengths in the technical data sheets, with reference to the surface of the fuel.
The remaining 13 levels are distributed along the rest of the float's path of movement. The presence of a tranquillisation chamber allows for the oscillations to be reduced that the float would otherwise experience while the vehicle is moving. The sensor is therefore a particularly precise and stable indicator under any operating conditions.
The electronic components are positioned in the flange and are completely sealed to ensure they are duly protected. With this configuration, the resistive level indicator can be used in any tank containing non-conductive liquids (petrol, unleaded petrol, diesel, etc.) and can be installed in the tank with a maximum inclination of 15° with respect to the vertical axis.