Grove- Piezo Vibration Sensor ----------------------------- Grove- Piezo Vibration Sensor is suitable for measurements of flexibility, vibration, impact and touch. The module is based on PZT film sensor LDT0-028. When the sensor moves back and forth, a certain voltage will be created by the voltage comparator inside of it. Therefore, outputs high & low levels. In spite of the fact that it has a high receptivity for strong impacts, a wide dynamic range (0.001Hz~1000MHz) also guarantees an excellent measuring performance. Finally, you can adjust its sensitivity by adjusting the potentiometer with a screw. Features Standard grove socket Wide dynamic range：0.001Hz~1000MHz Adjustable sensitivity High receptivity for strong impact Applications Vibration Sensing in Washing Machine Low Power Wakeup Switch Low Cost Vibration Sensing Car Alarms Body Movement Security Systems For more detail, please visit: http://www.seeedstudio.com/item_detail.html?p_id=1411