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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3
Head Size: 31 x 12 x 3mm / 1
Fit for:Computer cable and other mechanical equipments
security data signal transmission
Diameter: 73mm/2
insert the plastic tube
10pcs HC-34A NC Recessed Wired Gate Contact Sensor Alarm Magnetic Reed Switch Wheel Handles Head Size: 31 x 12Description: 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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