The PCB Piezotronics 352C33 is a widely used general purpose IEPE accelerometer with 10 mV/g sensitivity, shear mode construction, and a broad usable frequency range. It is a common reference point for accelerometer selection in noise and vibration measurement. PLACID IEPE accelerometers are designed for the same range of applications in structural vibration, NVH analysis, and combined acoustic-vibration measurement using PLACID DAQ systems.
Both the PCB 352C33 and PLACID IEPE accelerometers use the shear mode piezoelectric construction, which provides good immunity to base strain and temperature transient effects compared to compression mode designs. Both are powered by standard IEPE constant current supplies at 4 mA, 18–28 V compliance, and are compatible with any standard IEPE signal conditioning or IEPE-input DAQ system.
PLACID IEPE accelerometers are designed for use with PLACID PQ401, PQ801, and PQ1601 DAQ systems, using the same BNC input connections and IEPE current supply as the microphone preamplifiers. This allows seamless combined acoustic and vibration measurement in a single DAQ system. Contact PLACID to discuss accelerometer selection for your specific measurement application.
For vibration measurement in applications where results are cited in regulatory submissions, environmental impact assessments, or quality management records, calibration traceability for accelerometers is as important as for microphones. PLACID ISO/IEC 17025 accredited calibration for IEPE accelerometers includes a stated expanded measurement uncertainty for sensitivity at multiple frequencies across the measurement bandwidth. This provides the documentary evidence needed to demonstrate that accelerometer sensitivity is within specification at the time of measurement — a requirement for formal vibration measurement reports and for demonstrating compliance with standards such as ISO 2631 or ISO 9614.