QMseller MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch 2 Sets

Price: $8.49
(as of Dec 07,2022 19:33:51 UTC – Details)

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
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