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Alarm SystemsAll Home SecurityCaulking & SealantsDimmers, Switches, and Wall PlatesDoor HardwareDoor Security HardwareDoorbellsEmergency SuppliesFire SafetyFurniture HardwareGarage Door Openers and HardwareHome SafetyKitchen HardwareMailboxes and Mailbox AccessoriesPadlocksPaint Supplies & ToolsPersonal PreparednessPersonal SafetySealants, Fillers and AdhesivesStorm & Flood PrepSurveillanceTile Tools & MaterialsTool Equipment & Storage
Magnetic Door Sensor(436)
Uses item details. Price when purchased online
SimpliSafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System $42.35
Sponsored
$4235
current price $42.35SimpliSafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System
YoLink LoRa Smart Door Sensor Starter Kit: - 1/4 Mile Open-Air Range, Door Left-Open Reminders,5 Years Battery Life, SMS/Text, Email & App Alerts, Alexa, IFTTT, Home Assistant From $16.95
Sponsored
From$1695
YoLink LoRa Smart Door Sensor Starter Kit: - 1/4 Mile Open-Air Range, Door Left-Open Reminders,5 Years Battery Life, SMS/Text, Email & App Alerts, Alexa, IFTTT, Home Assistant
334.6 out of 5 Stars. 33 reviews
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Lot of 10 Honeywell Ademco 5816 WMWH White Door/Window Transmitter w/ Magnets, Batteries and Mounting Hardware $280.85
Sponsored
$28085
current price $280.85Lot of 10 Honeywell Ademco 5816 WMWH White Door/Window Transmitter w/ Magnets, Batteries and Mounting Hardware
15 out of 5 Stars. 1 reviews
Reduced price N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10pcs $18.71 Was $20.79
Sponsored
Now$1871
current price Now $18.71, Was $20.79$20.79
N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10pcs
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Best seller Door Window Alarm, Personal Security Window, Burglar Alarm, Home Security Wireless Magnetic Sensor Anti-Theft Alarm (8 Pcs) Home Alarm(Batteries not included) From $10.49
3 options
Available in additional 3 optionsFrom$1049
Door Window Alarm, Personal Security Window, Burglar Alarm, Home Security Wireless Magnetic Sensor Anti-Theft Alarm (8 Pcs) Home Alarm(Batteries not included)
1643.8 out of 5 Stars. 164 reviews
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6X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $8.55
$855
current price $8.556X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
15 out of 5 Stars. 1 reviews
WIFI Wireless Smart Magnetic Door Window Sensor Detector Alarm For Google Home $11.95
$1195
current price $11.95WIFI Wireless Smart Magnetic Door Window Sensor Detector Alarm For Google Home
33.7 out of 5 Stars. 3 reviews
2X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $6.39
$639
current price $6.392X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Window Alarm, 10-Pack Wireless Window Door Entry Alarm Burglar Security Alarm Magnetic Sensor Ideal for Home, Garage, Apartment, Dorm, Office Was $16.00
Window Alarm, 10-Pack Wireless Window Door Entry Alarm Burglar Security Alarm Magnetic Sensor Ideal for Home, Garage, Apartment, Dorm, Office
64.3 out of 5 Stars. 6 reviews
Zmodo Magnetic Door & Window Sensor - Pack of 4 $57.73
$5773
current price $57.73Zmodo Magnetic Door & Window Sensor - Pack of 4
15 out of 5 Stars. 1 reviews
Fosmon WaveLink Wireless Doorbell Chime, Home Security System Alarm When Door Opens, Magnetic Door Alarm And Sensor For Store, Restaurant, Business, Kids, Elderly & More, 1 Sensor 1 Receiver $21.99
Sponsored
$2199
current price $21.99Fosmon WaveLink Wireless Doorbell Chime, Home Security System Alarm When Door Opens, Magnetic Door Alarm And Sensor For Store, Restaurant, Business, Kids, Elderly & More, 1 Sensor 1 Receiver
474.2 out of 5 Stars. 47 reviews
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Clearance TECKNET Door Window Alarm,VOXON Door Alarms for Kids Safety Home Security Personal Security Window Alarms Sensor Burglar Door Alarm for Pool,Cars,Sheds,Caravans DIY Kit Pack of 2 $10.44 Was $12.99
Sponsored
Now$1044
current price Now $10.44, Was $12.99$12.99
TECKNET Door Window Alarm,VOXON Door Alarms for Kids Safety Home Security Personal Security Window Alarms Sensor Burglar Door Alarm for Pool,Cars,Sheds,Caravans DIY Kit Pack of 2
35 out of 5 Stars. 3 reviews
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Magnetic Door Switch,Magnetic Contacts Wired Window Magnetic Door Contact Sensor Detector Switch Normally Open/Closed $11.99
$1199
current price $11.99Magnetic Door Switch,Magnetic Contacts Wired Window Magnetic Door Contact Sensor Detector Switch Normally Open/Closed
Best seller Philips Personal Security Window and Door Alarm, 4-Pack, White From $15.97
2 options
Available in additional 2 optionsFrom$1597
Philips Personal Security Window and Door Alarm, 4-Pack, White
7814.5 out of 5 Stars. 781 reviews
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10Sets Wired Alarm Magnetic Door Contact Sensor Door Window Reed Switch Sensor With Double Side Tape For Security Window Sensors
10Sets Wired Alarm Magnetic Door Contact Sensor Door Window Reed Switch Sensor With Double Side Tape For Security Window Sensors
5X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $7.36
$736
current price $7.365X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Wireless Magnetic Door Sensor Alarm Home Security Device for Window 125bp Alarm
Wireless Magnetic Door Sensor Alarm Home Security Device for Window 125bp Alarm
15 out of 5 Stars. 1 reviews
Wired Door Sensor Magnetic Switch Home Anti-theft Alarm Dustproof Waterproof From $7.44
2 options
Available in additional 2 optionsFrom$744
Wired Door Sensor Magnetic Switch Home Anti-theft Alarm Dustproof Waterproof
6 Pack Wireless Door & Window Alarm, 90dB Magnetic Entry Alert System, Battery Operated Security Sensor with Adhesive Backing for Home, Apartment & Office $9.28
$928
current price $9.286 Pack Wireless Door & Window Alarm, 90dB Magnetic Entry Alert System, Battery Operated Security Sensor with Adhesive Backing for Home, Apartment & Office
Magnetic Sensor Home Door Window Entry Warning Alarm Switch $5.35
$535
current price $5.35Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Window Alarm, 6-Pack Mini Wireless Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home $8.99
Sponsored
$899
current price $8.99Window Alarm, 6-Pack Mini Wireless Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home
11 out of 5 Stars. 1 reviews
Eve Door & Window (Matter) 3 pack – Smart contact sensor for doors & windows, open/closed state, automatic control of accessories, notifications, Thread $94.95 Was $109.95
Sponsored
Now$9495
current price Now $94.95, Was $109.95$109.95
Eve Door & Window (Matter) 3 pack – Smart contact sensor for doors & windows, open/closed state, automatic control of accessories, notifications, Thread
Window Alarm, 6-Pack Mini Wireless Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home $8.99
$899
current price $8.99Window Alarm, 6-Pack Mini Wireless Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home
11 out of 5 Stars. 1 reviews
433MHz Wireless Magnetic Door & Window Sensor Home Security Alartor System Burglar Alartor Kits $16.42
$1642
current price $16.42433MHz Wireless Magnetic Door & Window Sensor Home Security Alartor System Burglar Alartor Kits
HomeZone Wi-Fi Smart Keypad Controlled Window or Door Alarm with Magnetic Switch, Compatible with Alexa and Google Assistant, White, 4 oz $14.97
$1497
current price $14.97HomeZone Wi-Fi Smart Keypad Controlled Window or Door Alarm with Magnetic Switch, Compatible with Alexa and Google Assistant, White, 4 oz
573.5 out of 5 Stars. 57 reviews
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20X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $19.39
$1939
current price $19.3920X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
32.3 out of 5 Stars. 3 reviews
Clearance 4Pc Door Window Alarm - 120Db Loud Magnetic Sensor, Battery Operated, Easy Install - For Home, Office, Apartment, Shop Security, Burglar Prevention Was $11.09
4Pc Door Window Alarm - 120Db Loud Magnetic Sensor, Battery Operated, Easy Install - For Home, Office, Apartment, Shop Security, Burglar Prevention
JYtrend Window Door Alarm, Burglar Security Magnetic Sensor (4 Pack) $12.99
$1299
current price $12.99JYtrend Window Door Alarm, Burglar Security Magnetic Sensor (4 Pack)
33.7 out of 5 Stars. 3 reviews
4X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $6.99
$699
current price $6.994X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
3Pcs Magnetic Door Sensor Alarm, BRELIL Intelligent Magnetic Door Sensor, Wireless Home Security Alarm For Doors And Windows, Easy Installation Intrusion Detector For Home Office Apartment Smart Home $22.99
$2299
current price $22.993Pcs Magnetic Door Sensor Alarm, BRELIL Intelligent Magnetic Door Sensor, Wireless Home Security Alarm For Doors And Windows, Easy Installation Intrusion Detector For Home Office Apartment Smart Home
Freezer Door Alarm When Left Open, 3/15/30/60 Seconds Adjustable Delay Wireless Fridge Alarm, 4-in-1 Door Sensor Chime Door Open Alarm Loud 108dB, Refrigerator Alarm 2 Pack From $13.99
Sponsored
From$1399
Freezer Door Alarm When Left Open, 3/15/30/60 Seconds Adjustable Delay Wireless Fridge Alarm, 4-in-1 Door Sensor Chime Door Open Alarm Loud 108dB, Refrigerator Alarm 2 Pack
74.4 out of 5 Stars. 7 reviews
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Wireless Door Alarms for Home Security with Remote, 130dB Door and Window Alarms Sensors, (Battery-Powered), Kids Safety, Dementia Patients, Pool Door Alarm (1-Pack) From $18.99
Sponsored
From$1899
Wireless Door Alarms for Home Security with Remote, 130dB Door and Window Alarms Sensors, (Battery-Powered), Kids Safety, Dementia Patients, Pool Door Alarm (1-Pack)
54.2 out of 5 Stars. 5 reviews
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Anti-thief Wireless Alarm Garage Door Magnetic Contacts Switch Sensor, Rolling Shutter Door Sensor for Home Store Security $19.59
$1959
current price $19.59Anti-thief Wireless Alarm Garage Door Magnetic Contacts Switch Sensor, Rolling Shutter Door Sensor for Home Store Security
10 Sets 433MHz Wireless Magnetic Door Window Sensors for Enhanced Home Security Compatible with Home Burglar Systems $27.29
$2729
current price $27.2910 Sets 433MHz Wireless Magnetic Door Window Sensors for Enhanced Home Security Compatible with Home Burglar Systems
8X Magnetic Sensor Home Door Window Entry Warning Alarm Switch $9.99
$999
current price $9.998X Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Window Alarm, 6-Pack Mini Wireless Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home
Window Alarm, 6-Pack Mini Wireless Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home
173.6 out of 5 Stars. 17 reviews
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Window Alarm, 10-Pack Mini Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home
Window Alarm, 10-Pack Mini Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector for Home
Hands-Free Door Chime or Window Alert with Magnetic Sensors,Activates When Door is Opened
4 options
Available in additional 4 optionsHands-Free Door Chime or Window Alert with Magnetic Sensors,Activates When Door is Opened
45 out of 5 Stars. 4 reviews
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20 Sets Nc Wired Surface Mounted Alarm Magnetic Door Alarm Contact Sensor Door Window Reed Switch Sensor with Double Side Tape for Security $28.78
$2878
current price $28.7820 Sets Nc Wired Surface Mounted Alarm Magnetic Door Alarm Contact Sensor Door Window Reed Switch Sensor with Double Side Tape for Security
HTZSAFE Wireless Door/Window Magnetic Sensor Alarm-600 Feet Long Wireless Transmission Range-35 Classic Melodies Optional,4 Volume Levels & LED Flash-Home/Business DIY Burglar Alert Security System $18.99
$1899
current price $18.99HTZSAFE Wireless Door/Window Magnetic Sensor Alarm-600 Feet Long Wireless Transmission Range-35 Classic Melodies Optional,4 Volume Levels & LED Flash-Home/Business DIY Burglar Alert Security System
Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch White 2 Sets $9.36 Was $11.49
Now$936
current price Now $9.36, Was $11.49$11.49
Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch White 2 Sets
13 out of 5 Stars. 1 reviews
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Sensor Alarm White- (10 Sets) $9.59
$959
current price $9.59Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Sensor Alarm White- (10 Sets)
Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Magnetic Sensor Alarm Smart Life for APP Remote Control $9.60
$960
current price $9.60Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Magnetic Sensor Alarm Smart Life for APP Remote Control
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Sensor Alarm White- (20 Sets) $15.27
$1527
current price $15.27Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Sensor Alarm White- (20 Sets)
Fosmon WaveLink Wireless Doorbell Chime, Home Security System Alarm When Door Opens, Magnetic Door Alarm And Sensor For Store, Restaurant, Business, Kids, Elderly & More, 1 Sensor 1 Receiver $21.99
$2199
current price $21.99Fosmon WaveLink Wireless Doorbell Chime, Home Security System Alarm When Door Opens, Magnetic Door Alarm And Sensor For Store, Restaurant, Business, Kids, Elderly & More, 1 Sensor 1 Receiver
474.2 out of 5 Stars. 47 reviews
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NEW Smart Magnetic Door Sensor Zigbee for Home Security Wireless Contact Programmable with Life $10.33
$1033
current price $10.33NEW Smart Magnetic Door Sensor Zigbee for Home Security Wireless Contact Programmable with Life
Alarm Magnetic Garage Door Rolling Door Contact Switch Sensor, Home Store Security Contact Magnetic Reed Switch Alarm $19.79
$1979
current price $19.79Alarm Magnetic Garage Door Rolling Door Contact Switch Sensor, Home Store Security Contact Magnetic Reed Switch Alarm
GE Personal Security Window/Door, 12-Pack, Magnetic Sensor, Off/Chime/Alarm, Easy Installation, 45989, White
GE Personal Security Window/Door, 12-Pack, Magnetic Sensor, Off/Chime/Alarm, Easy Installation, 45989, White
104.1 out of 5 Stars. 10 reviews
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Garage Door Sensor, Alarm Sensors Magnetic Contact For Home Garage Alarm Security $17.05
$1705
current price $17.05Garage Door Sensor, Alarm Sensors Magnetic Contact For Home Garage Alarm Security
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Sensor Alarm White- (10 Sets) $10.41 Was $12.30
Now$1041
current price Now $10.41, Was $12.30$12.30
Magnetic Door Switch RC-33 NC Recessed Wired Security Window Door Sensor Alarm White- (10 Sets)
Popular in Magnetic Door Sensors and Alarms for Home Security at Walmart
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Wireless Door Window Burglar Alarm with Sensor Sensitive and Easy to Install Alarm for Home Security
Wireless Door Window Burglar Alarm with Sensor Sensitive and Easy to Install Alarm for Home Security$3.39current price $3.39