SV 81 General Purpose Accelerometer 500 mV/g The epoxy sealed piezoelectric accelerometer model SV 81 is used in the petrochemical, machine tool, and paper industries for monitoring of slow speed agitators, cooling towers, etc. It incorporates a low-pass filter within the conditioning electronic. This filter attenuates the sensor mechanical resonance and the associated distortion and overload. Annular shear mode is less susceptible to transverse vibrations and better immune to electronic saturation at high frequencies. Low noise electronic and a temperature compensated design gives the accurate result over the complete temperature range.