KY-021 Magnetic Reed Switch Normally Open


5 in stock

SKU: KY-021 Magnetic Reed Module Category:


KY-021 is a magnetic reed switch sensor that is normally open and gets closed when exposed to a magnetic field.

The KY-021 Mini Magnetic Reed Switch Module consists of a 10kΩ resistor and a small reed switch actuated by a magnetic field, commonly used in mechanical systems as proximity sensors.


  • KY-021
  • Voltage : 3v to 5v
  • Size : 19mm x 16mm x 7mm