Piezo Film Sensors

Applications: Higher frequency applications strain gauge.

Pros: flexible, lightweight, and tough. In its simplest mode the film behaves like a dynamic strain gauge except that it requires no external power source and generates signals greater than those from conventional foil strain gages after amplification.

Cons: Operation down to fractions of Hz can be achieved using either conventional charge amplifiers or, since signal levels are relatively high, simple high impedance FET buffer circuits. Very slow events, 0.0001 Hz, for example, are not normally possible to detect with piezoelectric film.

Costs: Under 200$