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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Magnet Riser Compatible with ADT | Contact Spacers with 3M Adhesive | DIY Wireless Home Security Accessories - Device/Magnet Not Included (3/4 inch)
Regular price $19.98 USDRegular priceSale price $19.98 USD -
120 DB Loud Door and Window Open Alarm Sensor 3 Pack for Kids, Dementia Patients Safety, Burglar Anti-Theft Wireless Security Alarms Keep Your Home, Pool, Cabinet, Business Safe
Regular price $37.98 USDRegular priceSale price $37.98 USD -
Entry Sensor (Pack of 2) - Window and Door Protection - Compatible with tolviviov Home Security System
Regular price $37.98 USDRegular priceSale price $37.98 USD -
Magnet Riser Compatible with ADT | Contact Spacers with 3M Adhesive | DIY Wireless Home Security Accessories - Device/Magnet Not Included (1 inch)
Regular price $19.98 USDRegular priceSale price $19.98 USD -
WiFi Home Security System, 8-Piece Alarm Kit with 120dB Siren & Sensors
Regular price $119.98 USDRegular priceSale price $119.98 USD -
RC-36 NC/NO Recessed Wired Magnetic Reed Switch, Brown Door Window Contact Sensor for Home Burglar Alarm Systems, 10 Sets
Regular price $69.98 USDRegular priceSale price $69.98 USD -
Magnet Riser Compatible with ADT | Contact Spacers with 3M Adhesive | DIY Wireless Home Security Accessories - Device/Magnet Not Included (1/2 inch)
Regular price $19.98 USDRegular priceSale price $19.98 USD -
Magnetic Door Contact Switch, Recessed NC Alarm Sensor for Security
Regular price $15.98 USDRegular priceSale price $15.98 USD -
10 Sets NC Wired Surface Mounted Alarm Magnetic Door Contact Sensor Door Window Reed Switch Sensor with Double Side Tape for Security
Regular price $35.98 USDRegular priceSale price $35.98 USD -
Door Chime, Satisure Wireless Door Entry Alarm for Home, Store, School
Regular price $71.96 USDRegular priceSale price $71.96 USD -
Magnet Riser Compatible with ADT | Contact Spacers with 3M Adhesive | DIY Wireless Home Security Accessories - Device/Magnet Not Included (1/4 inch)
Regular price $19.96 USDRegular priceSale price $19.96 USD -
GoveeLife Door Window Smart Sensor H5123, Group Control Multiple Devices
Regular price $27.98 USDRegular priceSale price $27.98 USD -
MC-38 Door Window Contact Sensor Alarm Magnetic Reed Switch with Screws White - (2 Sets)
Regular price $13.98 USDRegular priceSale price $13.98 USD -
Door Chime When Door Opens, Doorbell Alarm for Home, Office, Store, Black
Regular price $65.96 USDRegular priceSale price $65.96 USD -
Motion Sensor 2 Pack - Compatible with tolviviov Home Alarm System-HUB Needed
Regular price $53.98 USDRegular priceSale price $53.98 USD -
Sensor Riser for Ring | Alarm Contact Sensor Riser 2nd Gen | Alarm Spacer with 3M Adhesive - Sensor/Magnet Not Included (1/2 inch)
Regular price $19.98 USDRegular priceSale price $19.98 USD