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Pre-mounted smooth foam tires
engineering machinery
wear-resistant and corrosion-resistant
-Thread Diameter: 30mm/1
10pcs RC-36 N.C. Recessed Magnetic Wired Door Contact Sensor Alarm Reed Switch Aviation Connectors Pre-mounted smooth foam tiresDescription: 1. 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 ). When make order,pls check carefully! 2. These are the 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. 3. Work as an anti theft alarm, perfect for metal door and window.
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