1 Piece 27mm Piezoelectric Transducers Piezoelectric Sensor , Piezo Transducer

A piezoelectric sensor or element is a device that uses the piezoelectric effect, it is basically a device which converts voltage to vibration and vibration to voltage. It normally comes in handy to measure knock (knock sensor) or vibration (vibration sensor). Specifications Of Piezo transducer : Outside Plate Diameter: 27mm (1.06 inches) Element Diameter: 20mm (.79 inches) Plate Thickness: ~0.5mm (.02 inches) Lead Length: ~50mm (~2 inches) Plate Material: Brass Resonant Frequency: 4.6KHz +/- 0.5kHz Resonant Impedance: 300 Ohm Max. Capacitance: 20.0nF +/- 30% @ 1kHz Package Contents: 1x (1 piece) 27mm Piezoelectric Disk Element Sound Sensor / Pickups with 2" Wire Leads