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Piezo Element (20mm)

Piezo Element (Vibration/Knock Sensor)
Availability :    20
Quantity :

  • Resonant Frequency(kHz): 3.0KHz ±0.5KHz
  • Resonant Impedance (ohm):  250
  • Capacitance: 35,000pF ±30%
  • Disc Diameter: 20mm
  • Wire Lead Length: 80mm (Approx.)

[N.B: The product may have a slight difference what is written in the specifications. This depends on the supplier.]

Piezo elements come in handy when you need to detect vibration or a knock. You can use these for tap or knock sensors pretty easily by reading the voltage on the output. They can also be used for a very small audio transducer such as a buzzer.
This basic Piezo Element measures 20mm across and is a great vibration sensor. Attach the round disc to the object that will be knocked on such as a door and measure the voltage across the two wires. Piezo elements can also produce sound when a voltage is applied across them. They convert between electricity and vibration in both ways; Vibration applied at the round end can be detected as a voltage across the wire leads and inversely, voltage applied across the wire leads causes the round end to vibrate.