Collection: Door & Window Alarms
Explore alarms and contact sensors that indicate when doors or windows open. Check mounting requirements, sensor spacing, power sources, and hub compatibility before purchasing.
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30PCS Recessed Wired Door Contact Sensor, NC, ABS White, RC-33
Regular price $53.98 USDRegular priceSale price $53.98 USD -
10PCS Recessed Wired Door Contact Sensor, NC, ABS White, RC-34A
Regular price $29.58 USDRegular priceSale price $29.58 USD -
10PCS Recessed Wired Door Contact Sensor, NC, ABS White, RC-33
Regular price $19.98 USDRegular priceSale price $19.98 USD -
MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, for Home Security and Burglar Alarm Systems, Sets of 5, White
Regular price $27.98 USDRegular priceSale price $27.98 USD -
Magnetic Reed Switch,Wired Door Window Contact Sensor,Micro Normally Open NO Alarm Reed Switch,10W 100v 0.5A Magnetic Reed Switch to DC 5V 12V 24V Light(2-Pack)
Regular price $19.98 USDRegular priceSale price $19.98 USD -
Zooz 800 Series Z-Wave Long Range Open|Close XS Sensor ZSE41 800LR for Door, Window, and Gate Monitoring. Hub Required (Sold Separately). Compatible with SmartThings, Hubitat, and Ring Alarm.
Regular price $79.50 USDRegular priceSale price $79.50 USD -
RC-36 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, for Home Security and Burglar Alarm Systems, Sets of 3, Brown
Regular price $15.98 USDRegular priceSale price $15.98 USD -
MC-33C NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, for Home Security and Burglar Alarm Systems, Sets of 2, White
Regular price $15.78 USDRegular priceSale price $15.78 USD -
Adhesive Replacement Tape & Sensor Risers Bundle for ADT | Includes 24 Magnet Adhesives and 12 ADT Contact Sensor Spacers - Complete Home Sensor Installation Solution [Device/Magnet NOT Included]
Regular price $37.94 USDRegular priceSale price $37.94 USD -
RC-35 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, for Home Security and Burglar Alarm Systems, Sets of 5, White
Regular price $17.98 USDRegular priceSale price $17.98 USD -
Adhesive Replacement Tape & Sensor Risers Bundle for Ring | Includes 24 Magnet Adhesives and 12 Ring Contact Sensor Spacers - Complete Home Sensor Installation Solution [Device/Magnet NOT Included]
Regular price $37.94 USDRegular priceSale price $37.94 USD -
MC-31 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, for Home Security and Burglar Alarm Systems, Sets of 3, White
Regular price $15.98 USDRegular priceSale price $15.98 USD -
Gebildet 6pcs Recessed Wired Security Window Gate Contact Sensor Alarm Magnetic Reed Switch,Magnet Near - Connect Circuit, Magnet Away - Break Circuit,Magnetic Switch(Cylindrical,Black)
Regular price $19.98 USDRegular priceSale price $19.98 USD -
MC-38 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, for Home Security and Burglar Alarm Systems, Sets of 2, Brown
Regular price $15.98 USDRegular priceSale price $15.98 USD -
Magnetic Reed Switch MC-32 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White - (6 Sets)
Regular price $25.78 USDRegular priceSale price $25.78 USD -
2 Sets MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch
Regular price $13.98 USDRegular priceSale price $13.98 USD