QMseller
Commercial Door Products
Commercial Door Products By QMseller
QMseller MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch 2 Sets - Product Features
- Product Name: Magnetic Door Switch; Model: MC-33C
- Contact Type: NC (Normally Closed)
- Work as an anti-theft alarm, ideal for metal door and window
- 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 )
- 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
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