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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WiFi Door Alarm System, 8-Piece DIY Wireless Alarm Kit with Door Sensors
Regular price $119.98 USDRegular priceSale price $119.98 USD -
Door Alarms for Kids Safety 120dB Window Alarms for Home Security
Regular price $23.98 USDRegular priceSale price $23.98 USD -
5 Sets Surface Mounted NC Magnetic Contacts Switch for Door/Window Alarm System with Double Side Tape (White)
Regular price $13.98 USDRegular priceSale price $13.98 USD -
5 Sets Surface Mounted NC Magnetic Contacts Switch for Door/Window Alarm System with Double Side Tape (Black)
Regular price $15.98 USDRegular priceSale price $15.98 USD -
2 Pack Zigbee Door Sensor, Mini Smart Contact Sensor for Home Automation, Kid Safety, Compatible with SmartThings, Alexa, Home Assistant, Aeotec, Hubitat, Homey, Zigbee Hub Required
Regular price $37.98 USDRegular priceSale price $37.98 USD -
4 Pcs Door Window Alarm,Home Magnetic Burglar Alert Sensor,Loud Door Alarms for Safety,DIY Protection Burglar Bell Alarm for Home,Office Security
Regular price $17.98 USDRegular priceSale price $17.98 USD -
YoLink Door & Window Sensor, 3-Pack, YS7704
Regular price $95.98 USDRegular priceSale price $95.98 USD -
Seco-Larm SM-300Q/W Pack of 12 Screw-Terminal Surface-Mount N.O. Magnetic Contacts, White; 1/2" Gap; ABS Case; Gold Plated Contacts; UL Listed; Reliable Security Door/Window Sensor
Regular price $119.90 USDRegular priceSale price $119.90 USD -
Magnetic Reed Switch RC-36 NC Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 10
Regular price $33.98 USDRegular priceSale price $33.98 USD -
Aqara Zigbee Door and Window Sensor 3 Pack, Wireless Mini Contact Sensor
Regular price $85.48 USDRegular priceSale price $85.48 USD -
Magnetic Reed Switch RC-36 NC Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 10
Regular price $31.98 USDRegular priceSale price $31.98 USD -
6 Sets Magnetic Reed Switch MC-32 NC Surface Mount Wired Security Door Window Alarm Door Window Contact Sensor for Home Security Burglar Alarm Systems (White)
Regular price $23.98 USDRegular priceSale price $23.98 USD -
MC-31B NC/NO Magnetic Reed Switch Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Systems, Sets of 10, White
Regular price $65.98 USDRegular priceSale price $65.98 USD -
Magnetic Reed Switch RC-36 NC Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 5
Regular price $18.78 USDRegular priceSale price $18.78 USD -
Door Window Alarm, 90dB Wireless Sensor Door Window Burglar Alarm for Home Security, Kids Safety and Office, Garage, Apartment, House, Easy Installation (12)
Regular price $23.78 USDRegular priceSale price $23.78 USD -
Magnetic Reed Switch RC-36 NC Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2
Regular price $14.38 USDRegular priceSale price $14.38 USD