An accelerometer comprising: a cylindrical 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 that includes a first aperture; the first and second piezoelectric elements (302A, 302B) extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements (302A, 302B), the piezoelectric elements (302A, 302B) define a first cantilever portion on a first side of the first mounting plate, and the piezoelectric elements (302A, 302B) define a second cantilever portion on a second side of the first mounting plate opposite the first side; the first mounting plate defines a periphery comprising: a first arcuate curve portion that abuts an interior wall of the housing; a second arcuate curve portion disposed opposite the first arcuate curve portion, the second arcuate curve portion abuts the interior wall of the housing; a first chord connecting a first end of the first arcuate curve portion with a first end of the second arcuate curve portion; and a second chord connecting a second end of the first arcuate curve portion with a second end of the second arcuate curve portion. a cylindrical 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 that includes a first aperture; the first and second piezoelectric elements (302A, 302B) extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements (302A, 302B), the piezoelectric elements (302A, 302B) define a first cantilever portion on a first side of the first mounting plate, and the piezoelectric elements (302A, 302B) define a second cantilever portion on a second side of the first mounting plate opposite the first side; 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 that includes a first aperture; the first and second piezoelectric elements (302A, 302B) extending through the first aperture such that the first mounting plate transects the first and second piezoelectric elements (302A, 302B), the piezoelectric elements (302A, 302B) define a first cantilever portion on a first side of the first mounting plate, and the piezoelectric elements (302A, 302B) define a second cantilever portion on a second side of the first mounting plate opposite the first side; the first mounting plate defines a periphery comprising: a first arcuate curve portion that abuts an interior wall of the housing; a second arcuate curve portion disposed opposite the first arcuate curve portion, the second arcuate curve portion abuts the interior wall of the housing; a first chord connecting a first end of the first arcuate curve portion with a first end of the second arcuate curve portion; and a second chord connecting a second end of the first arcuate curve portion with a second end of the second arcuate curve portion. a first arcuate curve portion that abuts an interior wall of the housing; a second arcuate curve portion disposed opposite the first arcuate curve portion, the second arcuate curve portion abuts the interior wall of the housing; a first chord connecting a first end of the first arcuate curve portion with a first end of the second arcuate curve portion; and a second chord connecting a second end of the first arcuate curve portion with a second end of the second arcuate curve portion.