Piezoelectric sensor are devices using the piezoelectric effect to measure acceleration, pressure, strain or force and converting them to an electrical signal.

Piezoelements are suitable for the detection of dynamic processes.

In static applications the piezoelectric charges are too small, in order to be detected.

An amplifier is used to convert the piezoelectric charges into a measurable electrical tension.

Principle of operations 3 modes of operation exist depending on how a piezoelectric material is cut: