【Package Included】: 4 Sets x Alarm Magnetic Reed Switch;Model: MC-33C
【Application】: The door contact sensors work as an anti-theft alarm, ideal for metal door and window.
【Easy To Install】: Have small screw terminals which makes it much easier to wire. Closed loop magnetic contact that features a terminal block style connection for accepting wire.
【Contact Type】: NC means Normally Closed: When the magnet together, the circuit is conductive( light on ); When the magnet separate, the circuit is not conductive ( light off )
【Has many uses】 MC-33C Door Contact Sensorsthe door contact sensors that are in use with any and all commercial or residential card access systems as well as all security burglar alarm system
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