YXQ 2Sets NC Mount Wired Door Window Sensor Magnetic Reed Switch Recessed Alarm Security System Normally Close White

Description

Size:NC 2sets Door Window Sensor Magnetic Switch Designed for use with alarm systems. Great for use in family and factory window, door.etc.Working Principle:When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off )Switch Type: NC(normal close type)The reed switch is an electrical switch operated by an applied magnetic field.Easy to install.