Abstract: A displacement transducer comprises a rigid support, a flexible diaphragm having a periphery attached to the support, and an interior free to deflect, and a strain sensor on the diaphragm. The diaphragm has a circular periphery and a plurality of concentric annular corrugations coaxial with the periphery. A first pair of strain gauges sense the tangential strain on one of the crests of the corrugations and a second pair of strain gauges sense the tangential strain in one of the troughs of the corrugations. The strain gauges are connected in an electrical bridge to provide a displacement representative output.