Hi, I am trying to measure the center deflection of a simply supported beam with a capacitive sensor. The beam's surface that is the sensor's target is originally flat. After applying equal forces on the two edges of the beam, its center curves upwards (away from the capacitive sensor) thus creating a concave surface. I am not sure how to correct the sensor's reading to compensate for the curvature of the beam. The beam's specs are: 5mm x 5mm cross-section, 30mm length. Equal forces of about 800-1000N are applied on each edge. The center moves up about 15um. The beam is made of high strength aluminum. The supports are placed in between the loading location and the center of the beam. Thus, its center moves up when the edges are pushed down. The capacitive sensor has a target electrode of 5mm in diameter. It's range is 500um and provides a voltage output of 1 volt per 50um. Its resolution goes down to 3 decimal places. I'd really appreciate any suggestions. Thank you.