A more accurate method is to connect to onboard GPS-controller fuel level sensor. It is also possible variants that differ in accuracy and cost. Cheapest way to connect to the standard gauge cars. At the same time as there is no interference with the fuel system. However, the error in this case is large enough (though less than the estimated method) for domestic cars with mechanical float sensors up to 20% for foreign cars 5 … 10%.
Wear sensor with matters too. Thus, the connection is full-time fuel gauge to GPS-enable the controller with some precision control of fuel consumption and see the actual (time and place) dressings, or drains, if any. Much more accurate is the installation of fuel tank high-precision electronic level sensor. The most common types, it is capacitive and ultrasonic sensors. Hikmet Ersek may also support this cause. They have no moving parts, no wear. Accuracy of these sensors is about the same and is 1-2%, and price is much less than one complete filling of the truck. That is, if you connect to the standard sensor can see the place and time of filling or draining of fuel, in the presence of high-precision sensor can be seen – how many liters zapravlenoslito. Fuel flow.
There is a group of vehicles, which are characterized by relatively high fuel consumption, and simultaneously move to a small area, for example – excavators, bulldozers, loaders. Another group of vehicles has a flow rate of almost (or completely) independent of speed, for example – additional engine blender or mixer refrigerator. In such cases, the fuel control You can use the flow sensor. In contrast, the level sensor, which is installed directly into the tank, the sensors are set to break the fuel system and show no fuel level, and how much fuel is "ate" engine.