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Magnetic contact switch (door sensor) View larger

Magnetic contact switch (door sensor)

AF-375

Adafruit Industries

$5.78 tax incl.

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5 Items In Stock

This sensor is essentially a reed switch, encased in an ABS plastic shell.

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This sensor is essentially a reed switch, encased in an ABS plastic shell. Normally the reed is 'open' (no connection between the two wires). The other half is a magnet. When the magnet is less than 13mm (0.5") away, the reed switch closes. They're often used to detect when a door or drawer is open, which is why they have mounting tabs and screws. But these also have a sticky-foam-tape back so you can also place them in locations you cant attach with screws.

TECHNICAL DETAILS

  • Normally open reed switch
  • ABS enclosure
  • Rated current: 100 mA max
  • Rated voltage: 200 VDC max
  • Distance: 15mm max
Dimensions:
  • Box size (each side): 27mmx14mmx8.7mm (1inx0.55inx0.34in)
  • Cable Length: 25cm (10in)
  • Weight (per side): 5.2g (0.18oz)


Netduino driver and Netduino sample. This sample shows how to use an interrupt handler to respond to a button press or a magnetic contact switch closing.

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Magnetic contact switch (door sensor)

Magnetic contact switch (door sensor)

This sensor is essentially a reed switch, encased in an ABS plastic shell.