QMseller MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch 2 Sets
Price: $8.49
(as of Feb 16, 2023 14:26:36 UTC – Details)
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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$189.10
QMseller MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch 2 Sets
$8.49
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