5pcs Recessed NC Security Alarm Door Window Contact Sensor Magnetic Reed Switch Lamp Guards Connection Diameter: 10mm to 12mm/0

Connection Diameter: 10mm to 12mm/0

The red line is to control the upper ball valve (threaded down)

Self-adhesive number stickers are efficient to target and identify anything you need to mark

Model: 6 Wells 6 Pins

5pcs Recessed NC Security Alarm Door Window Contact Sensor Magnetic Reed Switch Lamp Guards Connection Diameter: 10mm to 12mm/0NC means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). When make order,pls check carefully! The reed switch is an electrical switch operated by an applied magnetic field. Designed for use with alarm systems. Great for use in family and factory window, door. etc.