Magnetic contact switch (door sensor)

Item no.:
COM-13247
€4.78 €3.95
In stock
  • 10 + p/p €4.30 €3.55

Customer Reviews

Rated with 9.2 from 10 - Based on 564 reviews

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.

More information is available on the website of Sparkfun.

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