5pcs HC-34A NC Recessed Wire Gate Contact Sensor Alarm Magnetic Reed Switch Electronics Components Widely used for mechanical equipment

Widely used for mechanical equipment

Over-load and Short-circuit

Package includes: 60set M6 Mounting Screws (60pcs M6 Screws

5mm x 45mm/1

Features: twisted handle

5pcs HC-34A NC Recessed Wire Gate Contact Sensor Alarm Magnetic Reed Switch Electronics Components Widely used for mechanical equipmentDescription: 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.