1. Product Name: Magnetic Door Switch; Model: MC-33C
2.Contact Type: NC (Normally Closed)
3.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 )
4.Work as an anti-theft alarm, ideal for metal door and window
5.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
Description
Features: 1.Designed for use with alarm systems. 2.Great for use in family and factory window, door. etc. Package Included: 2 Sets x Normally Closed Recessed Window Door Contact Sensors