Reed Switch Module

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  • Operating Voltage: 3.3V to 5V DC
  • Output format: Digital switching output ( 0 and 1 )
  • LEDs indicating output and power
  • PCB Size: 32mm x 14mm
  • LM393 based design
  • Easy to use with Microcontrollers or even with normal Digital/Analog IC
  • Small, cheap and easily available


  • A reed switch is a sensor that closes the circuit in the presence of a magnetic field. Reed sensors can be used in many applications where contactless on/off is required. However, reed switches can be fragile to use directly, hence this module can make it easier to handle and mount the sensor in various applications.
  • Reed switch is a passive electronic switching component used to control the flow of electricity in a circuit. Reed Switch consists of a sealed glass envelope in which two ferrous elastic reeds are encased and this glass envelop is filled with an inert gas called rhodium. In normal conditions, the two reeds are separated in the envelope but when a magnetic substance approaches the glass envelope, the reeds will come together due to the magnetic field thus completing an electric circuit.

Applications of Reed Switch Sensor Module

  • Photocopiers
  • Washing machines,
  • Refrigerators
  • Door Magnets
  • Electromagnetic Relays, Electronic Weighing devices, Level Meters, etc.