I was always wondering, how capacitive fuel level senders in large aeroplanes account for the different fuel qualities. In some motorgliders, you have to switch your fuel level indicator according to the type of fuel you filled in (Avgas/Mogas) because the dielectric properties are different.
In large aeroplanes you can often also use different types of fuel (Jet A-1, JP-4, Avtur...) with different additives (anti icing, anti fungi...). Still you don´t have to change any settings on your fuel level indicator system. How does this work ???