KY-021 Mini Dry Reed Switch Pipe Module makerbot It can be used to

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KY-021 Mini Dry Reed Switch Pipe Module makerbot It can be used toA Mini Dry Reed Pipe Module KY 021 is a magnetic sensor that is normally open and gets closed when exposed to a magnetic field. The KY 021 Mini Dry Reed Pipe Module consists of a 10k resistor and a small reed switch actuated by a magnetic field, commonly used in mechanical systems as proximity sensors. Compatible with popular electronic platforms like Arduino, Teensy, etc Specifications Operating Voltage 3. 3V to 5v Output Type Digital