Magnetic Contact Switch

Detect when a door, window or box opens! Place the magnet on one side and the sensor (with wires) on the other. When the Magnet is within 3cm of the sensor, the 2 wires will be connected.

Contents:

• Magnetism Sensor / Reed Switch (with wire leads)
• Magnet

Features:

• Plastic Housings with Screw Holes
• Adhesive backing for both pieces for easy mounting in your projects
• Detect when a door, box, window or other item closes!
• Great for alarms, music boxes, drawers and other times you want to know whether something is open or closed.