Piezoelectric Charge Accelerometer 

Type 4391 is a piezoelectric, DeltaShear^®, Unigain^® accelerometer with top connector. Type 4391 features a TNC receptacle for output connection.

The accelerometer can be mounted on the object by means of a 10-32 UNF threaded steel stud.

USE SCENARIOS

• Shock and vibration measurement and analysis
• Vibration monitoring
• Modal and structural analysis
• Vibration test control
• Production and quality control

This accelerometer may be treated as a charge source. Its sensitivity is expressed in terms of charge per unit acceleration (pC/ms–2, pC/g). The DeltaShear design consists of three piezoelectric elements and three seismic masses arranged in a triangular configuration around a triangular centre post. They are held in place by a clamping ring that isolates the configuration from the base. The ring also prestresses the piezoelectric elements to give a high degree of linearity.

This design provides a high sensitivity-tomass ratio, a relatively high resonance frequency and high isolation from base strains and temperature transients. The piezoelectric element used in Type 4391 is a PZ 23 lead zirconate titanate element, and the housing material is titanium.

Type 4391 includes the following accessories:

• Carrying box
• Calibration chart
• YQ-2960: Set screw, 10 – 32 UNF