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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4 Sets Magnetic Reed Switch RC-35 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Magnetic Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch White
Regular price $19.98 USDRegular priceSale price $19.98 USD -
4 Sets Magnetic Reed Switch RC-36 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Magnetic Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch Brown
Regular price $25.98 USDRegular priceSale price $25.98 USD -
Hendun Door Alarms with Remote, Window Alarm for Kids Safety, 1 Pack
Regular price $19.98 USDRegular priceSale price $19.98 USD -
Door Window Alarms When Opened, 8 Pack, Volume Control
Regular price $77.38 USDRegular priceSale price $77.38 USD -
4 Sets Magnetic Reed Switch RC-33 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Magnetic Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch White
Regular price $19.98 USDRegular priceSale price $19.98 USD -
Door Window Alarm Sensors, 5 Pack, 125dB, Volume Control
Regular price $56.06 USDRegular priceSale price $56.06 USD -
5 Sets Door Sensor Cover Compatible with Ring (Color Matching), Snap-On Design for Ring 1st/2nd Gen Sensors, Strong Protective to Hide White Sensor, Upgrade Home Security Aesthetics - Brown
Regular price $31.98 USDRegular priceSale price $31.98 USD -
Door Chime, Door Alarm When Opened for Home/Business Office/Bedroom Entering, 3-Sensor + 1-Receiver with 500FT Wireless Range,58 Chimes,5-Volume Level, Entry Alert for Kids/Toddler/Dementia Safety
Regular price $75.98 USDRegular priceSale price $75.98 USD -
Door Window Alarm Sensors, 5 Pack, 125dB, Volume Control
Regular price $59.38 USDRegular priceSale price $59.38 USD -
WiFi Door Chime, Door Alarm Sensor with Phone Notifications via App
Regular price $99.98 USDRegular priceSale price $99.98 USD -
4-Pack Smart Door/Window Sensor: WiFi Alarm, Wireless Alerts, Compatible with Alexa/Google Assistant
Regular price $75.98 USDRegular priceSale price $75.98 USD -
Magnetic Reed Switch MC-32 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch,Sets of 2
Regular price $11.98 USDRegular priceSale price $11.98 USD -
Magnetic Reed Switch,Normally Closed NC Waterproof Magnetic Switch,Micro Alarm Reed Switch 10W 100v 0.5A Magnetic Door Sensor Switch to DC 5V 12V 24V Lights(2 Pack)
Regular price $25.98 USDRegular priceSale price $25.98 USD -
Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm
Regular price $55.98 USDRegular priceSale price $55.98 USD -
4 Sets Magnetic Reed Switch MC-32 NC/NO Surface Mount Wired Door Window Alarm, Magneti Door Switch, Magnetic Contact Sensor, for Home Security and Burglar Alarm Magnetic Reed Switch White
Regular price $19.98 USDRegular priceSale price $19.98 USD -
Door Window Alarm Sensors, 8 Pack, 125dB, Volume Control
Regular price $77.38 USDRegular priceSale price $77.38 USD