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Magnetic contact switch (door sensor)

Magnetic contact switch (door sensor)
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Our Price:  £3.98(Inc. 20% VAT)(£3.32 Exc. VAT)Earn 3 Loyalty Points
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SKU:  PPADA375
Part Number:  375
Brand:  AdaFruit

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  (1 Review)

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.

  • 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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Customer Reviews
Average Rating (1 Review):  
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Rating:  
Work well, perfect for little projects.
Saturday, 9 August 2014  |  James

I got two of these so that I could monitor my front door and letter box, they are nice and small so will fit almost anywhere around your door frame, and they work nicely even when connected to 5ish meters of cable into an Arduino! Nice and simple to use

 

2 of 2 people found this review helpful.

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