Patent ID: 7997132

Claim:
A capacitive sensor assembly for measuring relative position between first and second objects, the capacitive sensor assembly comprising: an electronics section having a touch-sensitive module that is capable of receiving and processing signals from a capacitive touch device, the touch-sensitive module comprising a plurality of ports; and a probe section comprising a plurality of independently operating antenna probes of different lengths connected to a different one of the plurality of ports, each antenna probe including an elongate electrical conductor, an insulating layer covering at least a portion of the electrical conductor, and an offset tip portion representing a discrete measurement position; wherein the longest antenna probe is adapted for continuous measurement of level and the shorter antenna probes are adapted to modify a measurement reading at the discrete measurement positions to thereby dynamically calibrate the longest antenna probe; wherein a change in detected capacitance of at least one antenna probe is reflective of a change in relative movement or position between the first and second objects.