QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 10 with 40 Screws industrial EDIVIA Active Digital Pencil with

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QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 10 with 40 Screws industrial EDIVIA Active Digital Pencil withQWORK MC 31 Wired Surface Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 10 with 40 Screws Sensor Product name: Surface mounted Magnetic Door Switch, Type: MC 31, Color: White, Material: Plastic. Read more NC Type NC means normally closed. If the magnet is closed to this switch, the signal is conductive, otherwise, if the magnet is far away from this switch, the signal is disconnected. Sizes 6412. 12mm and 642012mmL W