Magnetic contact switch (door sensor)

Description: 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 can't 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)