The Model 6064 and 6066 Piezoelectric Accelerometers are excellent general-purpose shock and vibration measurement sensors, where small size and low mass, permits their use on small, lightweight specimens. They are designed for the measurement of wideband, moderate to high-level shock and vibration. The sensors incorporate an inverted shear crystal-mass assembly within a stainless steel body to provide a reliable sensor that is insensitive to environmental inputs such as base bending and thermal transients.