Originally posted by pabloquintana:
Do you mean logarithmic? 
are you posturing? 
i don't think the poster did, or i hope not as it has nothing to do with the scale of the measurement.
it's arithmetic as the actual reading of the "float thingy" has to be corrected using an arithmetic model or a lookup table if it's overly complex, this is not done in our cars.
this is a great overall post BTW.
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