Shop magnetic door alarm sensors

Sponsored
$39.99
Ring Alarm Contact Sensor 2-Pack (2Nd Gen)
Amazon.com
25K+
Free shipping
$39.99
Ring Alarm Contact Sensor 2-Pack (2Nd Gen)
Amazon.com
25K+
$14.99
Simplisafe Entry Sensor - Window And Door Protection - Compatible With Gen 3 Home Security System
Amazon.com
3K+
$14.99
Simplisafe Entry Sensor - Window And Door Protection - Compatible With Gen 3 Home Security System
Amazon.com
3K+
$19.99
Ring Alarm Contact Sensor (2Nd Gen)
Amazon.com
26K+
$19.99
Ring Alarm Contact Sensor (2Nd Gen)
Amazon.com
26K+
$27.99
Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry
Amazon.com
3K+
$27.99
Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry
Amazon.com
3K+
$14.97
$21.94
Window Alarm, 10-Pack Mini Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector For Home
Walmart
31% off
$14.97
$21.94
Window Alarm, 10-Pack Mini Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector For Home
Walmart
$49.99
Simplisafe - 4Pack Entry Sensor - White
Best Buy
235
$49.99
Simplisafe - 4Pack Entry Sensor - White
Best Buy
235
$15.50
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 3 Pcs | Authorizid
Intellid Products
$15.50
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 3 Pcs | Authorizid
Intellid Products
$14.99
Simplisafe - 1Pack Entry Sensor - White
Best Buy
698
$14.99
Simplisafe - 1Pack Entry Sensor - White
Best Buy
698
$15.75
Wired Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
Intellid Products
$15.75
Wired Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
Intellid Products
$7.99
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 1 Pcs | Authorizid
Intellid Products
$7.99
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 1 Pcs | Authorizid
Intellid Products
$24.69
Xodus Innovations HS4317B Battery Powered Wireless Security Door Alarm With Key Pad And Chime Or Alarm Mode, White
Amazon.com
$24.69
Xodus Innovations HS4317B Battery Powered Wireless Security Door Alarm With Key Pad And Chime Or Alarm Mode, White
Amazon.com
$304.15
DETEX Door Prop Alarm Surface Mount Battery Powered One MS-1039S Magnetic Switch Mortise Cylinder Black EAX-300SK1 BLACK MC65 SI
DkHardware.com
$304.15
DETEX Door Prop Alarm Surface Mount Battery Powered One MS-1039S Magnetic Switch Mortise Cylinder Black EAX-300SK1 BLACK MC65 SI
DkHardware.com
$8.16
Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Walmart
Free shipping
$8.16
Magnetic Sensor Home Door Window Entry Warning Alarm Switch
Walmart
Free shipping
$15.70
Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
Intellid Products
$15.70
Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
Intellid Products
$16.82
2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
Temu US
75
$16.82
2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
Temu US
75
$69.99
Philips Hue Secure Smart Contact Sensor, White - 2 Pack - Made For Indoor Doors And Windows - Requires Hue Bridge - Works With The Hue App
Amazon.com
12
Free shipping
$69.99
Philips Hue Secure Smart Contact Sensor, White - 2 Pack - Made For Indoor Doors And Windows - Requires Hue Bridge - Works With The Hue App
Amazon.com
12
$15.99
Door And Window Alarm For Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 90 Db, 4-In-1 Mode Window Alarms 6 Pack
Walmart
Free shipping
$15.99
Door And Window Alarm For Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 90 Db, 4-In-1 Mode Window Alarms 6 Pack
Walmart
Free shipping
$29.95
Wireless Window/Door Exit Sensor By Concord Health Supply
Concord Health Supply
$29.95
Wireless Window/Door Exit Sensor By Concord Health Supply
Concord Health Supply
$23.19
2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
Temu US
75
$23.19
2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
Temu US
75
$12.74
2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
Temu US
75
$12.74
2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
Temu US
75
$12.33
$13.70
20Pcs RC-33 Magnetic Door Sensors - Wired Window & Door Alarm Switches For Home Security Systems, USB Powered
Temu US
$12.33
$13.70
20Pcs RC-33 Magnetic Door Sensors - Wired Window & Door Alarm Switches For Home Security Systems, USB Powered
Temu US
$34.99
10 Pc Brown N.C. Recessed Door Contacts (Normally Closed) Alarm Door Window Sensors With Magnetic Reed Switch.
Walmart
Free shipping
$34.99
10 Pc Brown N.C. Recessed Door Contacts (Normally Closed) Alarm Door Window Sensors With Magnetic Reed Switch.
Walmart
Free shipping
$6.29
Uxcell Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch White 2 Sets | Harfington
harfington
$6.29
Uxcell Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch White 2 Sets | Harfington
harfington
$10.16
Uxcell 5Pcs Recessed NC Security Alarm Door Window Contact Sensor Magnetic Reed Switch | Harfington
harfington
70
$10.16
Uxcell 5Pcs Recessed NC Security Alarm Door Window Contact Sensor Magnetic Reed Switch | Harfington
harfington
70
$10.99
Uxcell 5Pcs RC-35 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
$10.99
Uxcell 5Pcs RC-35 NC Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White | Harfington
harfington
$14.45
MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Sw
eBay.com
Free shipping
$14.45
MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Sw
eBay.com
Free shipping
$139.32
9-Piece Door Alarm System Kit For Home Security Kids Safety With APP Window Sensor Work With Alexa For House Apartment
Home Depot
Free shipping
$139.32
9-Piece Door Alarm System Kit For Home Security Kids Safety With APP Window Sensor Work With Alexa For House Apartment
Home Depot
Free shipping
$11.00
Door Window Magnetic Contact Sensor Detector Switch For Home Alarm Security
eBay.com
$11.00
Door Window Magnetic Contact Sensor Detector Switch For Home Alarm Security
eBay.com
$16.43
NC Wired Magnetic Alarm Window Door Contact Sensor Detector Reed Switch White
eBay.com
Free shipping
$16.43
NC Wired Magnetic Alarm Window Door Contact Sensor Detector Reed Switch White
eBay.com
Free shipping
$8.78
MC-38 Wired Door Window Sensor Magnetic Switch For PTSN And GSM Alarm System, 1PCS
vipih.com
$8.78
MC-38 Wired Door Window Sensor Magnetic Switch For PTSN And GSM Alarm System, 1PCS
vipih.com
$44.58
Tresco WLDS-BL Wireless Door Sensor BLACK
Woodworker's Hardware
$44.58
Tresco WLDS-BL Wireless Door Sensor BLACK
Woodworker's Hardware
$19.99
Alarm Window And Door Contact Sensor
Ring
$19.99
Alarm Window And Door Contact Sensor
Ring
$10.14
Tuya Doodle Wifi Door Magnetic Sensor Remote Intelligent Linkage Doors And Windows Open And Close Anti-Alarm APP Alert Alarm
Banggood
$10.14
Tuya Doodle Wifi Door Magnetic Sensor Remote Intelligent Linkage Doors And Windows Open And Close Anti-Alarm APP Alert Alarm
Banggood
$340.52
DETEX Surface Mount Battery Powered 100DB Door Prop Alarm With Internal Magnetic Door Contacts And Back Box With Mortise Cylinder Gray Fini EAX300MC65
DkHardware.com
$340.52
DETEX Surface Mount Battery Powered 100DB Door Prop Alarm With Internal Magnetic Door Contacts And Back Box With Mortise Cylinder Gray Fini EAX300MC65
DkHardware.com
$105.75
Rugged Door Contact Sensor With Universal-Style Magnet
Server Racks
$105.75
Rugged Door Contact Sensor With Universal-Style Magnet
Server Racks
$22.98
Uxcell 5Pcs Recessed Nc Security Alarm Door Window Contact Sensor Magnetic Reed Switch
Mechanic Surplus
70
$22.98
Uxcell 5Pcs Recessed Nc Security Alarm Door Window Contact Sensor Magnetic Reed Switch
Mechanic Surplus
70
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    Shop magnetic door alarm sensors

    Sponsored
    $39.99
    Ring Alarm Contact Sensor 2-Pack (2Nd Gen)
    Amazon.com
    25K+
    Free shipping
    $39.99
    Ring Alarm Contact Sensor 2-Pack (2Nd Gen)
    Amazon.com
    25K+
    $14.99
    Simplisafe Entry Sensor - Window And Door Protection - Compatible With Gen 3 Home Security System
    Amazon.com
    3K+
    $14.99
    Simplisafe Entry Sensor - Window And Door Protection - Compatible With Gen 3 Home Security System
    Amazon.com
    3K+
    $19.99
    Ring Alarm Contact Sensor (2Nd Gen)
    Amazon.com
    26K+
    $19.99
    Ring Alarm Contact Sensor (2Nd Gen)
    Amazon.com
    26K+
    $27.99
    Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry
    Amazon.com
    3K+
    $27.99
    Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry
    Amazon.com
    3K+
    $14.97
    $21.94
    Window Alarm, 10-Pack Mini Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector For Home
    Walmart
    31% off
    $14.97
    $21.94
    Window Alarm, 10-Pack Mini Window Door Entry Alarm Burglar Security Alarm System Magnetic Sensor Protector For Home
    Walmart
    $49.99
    Simplisafe - 4Pack Entry Sensor - White
    Best Buy
    235
    $49.99
    Simplisafe - 4Pack Entry Sensor - White
    Best Buy
    235
    $15.50
    Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 3 Pcs | Authorizid
    Intellid Products
    $15.50
    Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 3 Pcs | Authorizid
    Intellid Products
    $14.99
    Simplisafe - 1Pack Entry Sensor - White
    Best Buy
    698
    $14.99
    Simplisafe - 1Pack Entry Sensor - White
    Best Buy
    698
    $15.75
    Wired Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
    Intellid Products
    $15.75
    Wired Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
    Intellid Products
    $7.99
    Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 1 Pcs | Authorizid
    Intellid Products
    $7.99
    Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 1 Pcs | Authorizid
    Intellid Products
    $24.69
    Xodus Innovations HS4317B Battery Powered Wireless Security Door Alarm With Key Pad And Chime Or Alarm Mode, White
    Amazon.com
    $24.69
    Xodus Innovations HS4317B Battery Powered Wireless Security Door Alarm With Key Pad And Chime Or Alarm Mode, White
    Amazon.com
    $304.15
    DETEX Door Prop Alarm Surface Mount Battery Powered One MS-1039S Magnetic Switch Mortise Cylinder Black EAX-300SK1 BLACK MC65 SI
    DkHardware.com
    $304.15
    DETEX Door Prop Alarm Surface Mount Battery Powered One MS-1039S Magnetic Switch Mortise Cylinder Black EAX-300SK1 BLACK MC65 SI
    DkHardware.com
    $8.16
    Magnetic Sensor Home Door Window Entry Warning Alarm Switch
    Walmart
    Free shipping
    $8.16
    Magnetic Sensor Home Door Window Entry Warning Alarm Switch
    Walmart
    Free shipping
    $15.70
    Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
    Intellid Products
    $15.70
    Door Contacts Surface Mount NC Security Alarm Door Window Sensors - White, 3 Pcs | Authorizid
    Intellid Products
    $16.82
    2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
    Temu US
    75
    $16.82
    2/5/6/7/8/10Pcs 130DB Alarm, Door Security Protection, Door Window Burglar Alarm With Magnetic Sensor, Home Safety System Alarm
    Temu US
    75
    $69.99
    Philips Hue Secure Smart Contact Sensor, White - 2 Pack - Made For Indoor Doors And Windows - Requires Hue Bridge - Works With The Hue App
    Amazon.com
    12
    Free shipping
    $69.99
    Philips Hue Secure Smart Contact Sensor, White - 2 Pack - Made For Indoor Doors And Windows - Requires Hue Bridge - Works With The Hue App
    Amazon.com
    12
    $15.99
    Door And Window Alarm For Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 90 Db, 4-In-1 Mode Window Alarms 6 Pack
    Walmart
    Free shipping
    $15.99
    Door And Window Alarm For Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 90 Db, 4-In-1 Mode Window Alarms 6 Pack
    Walmart
    Free shipping
    $29.95
    Wireless Window/Door Exit Sensor By Concord Health Supply
    Concord Health Supply
    $29.95
    Wireless Window/Door Exit Sensor By Concord Health Supply
    Concord Health Supply

    • Door Alarms—only $14.99 each | #1 Rated Security is 50% off

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