A Knock Sensor or a Vibration Sensor is a simple device that detects vibrations or shocks from knocking or tapping it. It is basically an electronic switch which normally open. When it detects any shock or vibrations, it closes (for that moment and returns back to its default open position).

Technical Specification:

• Operating voltage: 3 ~ 5V
• Default Output: High
• Output Type: Digital
• Size: 19.5mm*16mm*7.5mm (L*W*H)

Features:

• Single channel signal output
• Convenient to install
• Circuit board output switch

Applications:          

• Safety applications
• Door knock system
• Vibration Sensing