Abstract: A capacitive sensor assembly for determining a fluid level within a fluid reservoir sensing through impedance change due to capacitive element driven by radio frequency differential voltage source. The chip is supplied with a pair of voltage sources having opposite phases and similar magnitude, a resultant capacitance changes being represented as a changing voltage output via a capacitive voltage divider arrangement. A feedback loop with an LC circuit is also applied to the received voltages maintains the same value to compensate for measuring different fluid with the same sensor configuration or aging/acidization changes in the dielectric constant of the oil as it ages.