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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Seco-Larm SM-216Q/BR Wide Gap Magnetic Contact, Brown
Regular price $30.38 USDRegular priceSale price $30.38 USD -
Wireless Door Bell Chimes with 1 Plug-in Receivers, 1 Waterproof Push Button,1 Door Chime, Easy Installation,doorbell Chime for Home/Business with 500ft Range, 26 Chimes, 0-110dB
Regular price $53.98 USDRegular priceSale price $53.98 USD -
Seco-Larm SM-216Q/GY Wide Gap Magnetic Contact, Gray
Regular price $17.74 USDRegular priceSale price $17.74 USD -
Wireless Door Chime, Door Entry Sensor Alarm for Home and Business
Regular price $55.98 USDRegular priceSale price $55.98 USD -
ecobee Smart Sensor for Doors & Windows 2 Pack for Home Security
Regular price $119.98 USDRegular priceSale price $119.98 USD -
SONOFF SenseGuard DW Gen2 SNZB-04PR2 Zigbee Door Window Contact Sensor, Open/Close Monitoring, Tamper Proof, Phone Alert, Home Security Alarm, Works with Alexa, Home Assistant & SmartThings, 1-Pack
Regular price $27.80 USDRegular priceSale price $27.80 USD -
10mm Riser Compatible with Ring Contact Sensor (2nd Gen), 3 Sets
Regular price $35.98 USDRegular priceSale price $35.98 USD -
SONOFF SenseGuard DW Gen2 SNZB-04PR2 Zigbee Door Window Contact Sensor, Open/Close Monitoring, Tamper Proof, Phone Alert, Home Security Alarm, Works with Alexa, Home Assistant & SmartThings, 4-Pack
Regular price $79.80 USDRegular priceSale price $79.80 USD -
Biaungdo 4 Pcs Brown Wired Magnetic Door Window Contact Reed Switch
Regular price $13.98 USDRegular priceSale price $13.98 USD -
DSC PG9303 PowerG Wireless Door Window Vanishing Magnetic Contact, 2-Way Encrypted Wireless Sensor, Slim Design, Easy Pull-Tab Enrollment, Compatible with PowerSeries Neo Pro Panels
Regular price $93.94 USDRegular priceSale price $93.94 USD -
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Regular price $131.50 USDRegular priceSale price $131.50 USD -
2 Sets Magnetic Reed Switch NO/NC, Wired Door Window Contact Sensor
Regular price $17.98 USDRegular priceSale price $17.98 USD -
Biaungdo 4 Pcs Brown Wired Magnetic Door Window Contact Reed Switch, Surface-Mounted NC Magnetic Door Contact Sensor Alarm Reed Switchfor Window, Cabinet, Wooden Doors, with Screws (Pack of 2)
Regular price $25.96 USDRegular priceSale price $25.96 USD -
WiFi Alarm System for Home Security, DIY,120db alarm, App Alerts 8pack
Regular price $119.98 USDRegular priceSale price $119.98 USD -
2 Sets Magnetic Reed Switch NO/NC, Wired Door Window Contact Sensor
Regular price $17.98 USDRegular priceSale price $17.98 USD -
Biaungdo 6 Pcs Brown Wired Magnetic Door Window Contact Reed Switch
Regular price $14.58 USDRegular priceSale price $14.58 USD