The Rion PV-57I is a compact, general-purpose piezoelectric accelerometer featuring an integrated amplifier (IEPE/CCLD) for low-noise, high-accuracy vibration measurements. With a nominal voltage sensitivity of 5.1 mV/(m/s²), it delivers stable, reliable signal output for industrial machinery monitoring and field testing across compatible Rion vibration meters and analyzers (including the VM-82A, VM-83, and VA-12).