An accelerometer, comprising: a housing ; a sensor sealed within the housing , the sensor comprising: a first piezoelectric element having a first polarization, the first piezoelectric element defines an upper surface; a second piezoelectric element having a second polarization, the second piezoelectric element defines a lower surface parallel to the upper surface of the first piezoelectric element, and the first polarization aligned with the second polarization; a first mounting plate having a substrate of non-conductive material, the first mounting plate defines a first aperture ; the first and second piezoelectric elements extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements , the piezoelectric elements define a first cantilever portion on a first side of the first mounting plate , and the piezoelectric elements define a second cantilever portion on a second side of the first mounting plate opposite the first side; wherein the first mounting plate defines a periphery that abuts an interior wall of the housing , the periphery being attached to the interior wall of the housing . a housing ; a sensor sealed within the housing , the sensor comprising: a first piezoelectric element having a first polarization, the first piezoelectric element defines an upper surface; a second piezoelectric element having a second polarization, the second piezoelectric element defines a lower surface parallel to the upper surface of the first piezoelectric element, and the first polarization aligned with the second polarization; a first mounting plate having a substrate of non-conductive material, the first mounting plate defines a first aperture ; the first and second piezoelectric elements extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements , the piezoelectric elements define a first cantilever portion on a first side of the first mounting plate , and the piezoelectric elements define a second cantilever portion on a second side of the first mounting plate opposite the first side; wherein the first mounting plate defines a periphery that abuts an interior wall of the housing , the periphery being attached to the interior wall of the housing . a first piezoelectric element having a first polarization, the first piezoelectric element defines an upper surface; a second piezoelectric element having a second polarization, the second piezoelectric element defines a lower surface parallel to the upper surface of the first piezoelectric element, and the first polarization aligned with the second polarization; a first mounting plate having a substrate of non-conductive material, the first mounting plate defines a first aperture ; the first and second piezoelectric elements extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements , the piezoelectric elements define a first cantilever portion on a first side of the first mounting plate , and the piezoelectric elements define a second cantilever portion on a second side of the first mounting plate opposite the first side; wherein the first mounting plate defines a periphery that abuts an interior wall of the housing , the periphery being attached to the interior wall of the housing . <EOS>