Patent ID: 9528903
Filing Date: 2016-12-27
CPC Classification: E03B,F16L,F17D,G01H,G01L,G01M,G01N,H04R

Claim Text:
1. A sensor comprising: at least one piezoelectric crystal having an upper surface and a lower surface; a base having an attachment section defining an attachment surface, a first calibration mass, a second calibration mass, and a notch between the first calibration mass and the second calibration mass, the first calibration mass comprising a first calibration mass thickness greater than a thickness of the attachment section of the base, and the second calibration mass comprising a second calibration mass thickness greater than the thickness of the attachment section of the base, the base further defining an axis therethrough; wherein a one of the at least one piezoelectric crystal upper surface and lower surface attaches to the attachment surface of the base; and wherein the at least one piezoelectric crystal is positioned radially inward from the first calibration mass and the second calibration mass relative to the axis of the base.