OC-55 NO+NC Alarm Security Rolling Gate Garage Door Contact Magnetic Reed Switch RC Boat Propeller Vanes it is a necessary spare

it is a necessary spare part for DIY

* Color: Black

These thumb screws are a great replacement for the outer case screws

The wire range of the 19 Positions Screw Terminal Block is 12-24AWG

OC-55 NO+NC Alarm Security Rolling Gate Garage Door Contact Magnetic Reed Switch RC Boat Propeller Vanes it is a necessary spareDescription: 1. Actuation Distance: 40 50mm. Zinc Alloy Housing, Stainless Steel Pipe. 2. The reed switch is an electrical switch operated by an applied magnetic field. 3. Designed for use with alarm systems. Great for use in family and factory window, door. etc. 4. Screw Mounted for easily install. 5. NC means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive (