A capacitive sensing system comprising two or more capacitive sensors, one or more AC power sources for energizing the capacitive sensors, and a signal processing circuit for processing signals from the sensors. The sensors are arranged in pairs, wherein the one or more AC power sources are arranged to energize a first sensor of a pair of the sensors with an alternating current or voltage 180 degrees out of phase to a current or voltage for a second sensor of the pair of sensors, and wherein a pair of the sensors provides a measuring unit for a single measured distance value, the signal processing circuit receiving an output signal from each sensor of the pair and generating a measured value related to the average distance between the sensors of the pair and the target.