Bruel and Kjaer 4393

Bruel and Kjaer 4393

Piezoelectric Charge Accelerometer

The Bruel + Kjaer 4393 is one of our used Piezoelectric Charge Accelerometers.

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Product Overview:

Type 4370 is a piezoelectric, DeltaShear®, Unigain® accelerometer with top connector. Type 4370 features 10 – 32 UNF receptacle for output connection and can be mounted on the object by means of a 10 – 32 UNF threaded steel stud.


This piezoelectric accelerometer may be treated as a charge source. Its sensitivity is expressed in terms of charge per unit acceleration (pC/g).

The DeltaShear design involves three piezoelectric elements and three masses arranged in a triangular configuration around a triangular centre post. The ring prestresses the piezoelectric elements to give a high degree of linearity. The charge is collected between the housing and the clamping ring. The piezoelectric element used is a PZ 23 lead zirconate titanate element. The housing material is stainless steel.