Shop Window Sensors for Alarm Systems

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$11.66
7939WG-WH - Ademco Surface Mount Contacts (White) | Ademco 7939WG-WH Surface Mount Contacts, White Reliable Door/Window Sensor For Residential And
Amazon.com
358
$11.66
7939WG-WH - Ademco Surface Mount Contacts (White) | Ademco 7939WG-WH Surface Mount Contacts, White Reliable Door/Window Sensor For Residential And
Amazon.com
358
$19.99
$29.98
Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
Amazon.com
27K+
33% off
$19.99
$29.98
Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
Amazon.com
27K+
$27.99
RC-35 NC/NO Recessed Wired Door Window Magnetic Reed Contact Sensor, Home Burglar Security Alarm, 6 Sets
Amazon.com
19
$27.99
RC-35 NC/NO Recessed Wired Door Window Magnetic Reed Contact Sensor, Home Burglar Security Alarm, 6 Sets
Amazon.com
19
$6.99
Hxchen MC-38 Door Window Contact Sensor Alarm Magnetic Reed Switch With Screws White - (2 Sets)
Amazon.com
49
$6.99
Hxchen MC-38 Door Window Contact Sensor Alarm Magnetic Reed Switch With Screws White - (2 Sets)
Amazon.com
49
$23.99
Sanjie Door Window Alarm Sensors, 3 Pack, 125Db, Volume Control | 125Db Wireless Sensors Alert When Doors Or Windows Open, With Adjustable Volume,
Amazon.com
446
$23.99
Sanjie Door Window Alarm Sensors, 3 Pack, 125Db, Volume Control | 125Db Wireless Sensors Alert When Doors Or Windows Open, With Adjustable Volume,
Amazon.com
446
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
2
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
2
$19.99
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
Amazon.com
129
$19.99
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
Amazon.com
129
$19.99
GAGALOR 20 Sets NC Magnetic Contacts Window Door Sensor Surface-Mounted Reed Switch Alarm With Double Side Tape
Amazon.com
13
$19.99
GAGALOR 20 Sets NC Magnetic Contacts Window Door Sensor Surface-Mounted Reed Switch Alarm With Double Side Tape
Amazon.com
13
$8.97
QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack Of 10 With 40 Screws
Amazon.com
328
$8.97
QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack Of 10 With 40 Screws
Amazon.com
328
$43.66
$49.88
15 Sets Of High Decibel Window And Door Magnetic Alarm Sensors For Home Security Systems, Easy To Install, Can Be Attached To Windows Or Doors,
Temu US
12% off
$43.66
$49.88
15 Sets Of High Decibel Window And Door Magnetic Alarm Sensors For Home Security Systems, Easy To Install, Can Be Attached To Windows Or Doors,
Temu US
$16.99
Sonew 10Pcs NC Recessed Wired Door Window Sensor Magnetic Reed Switch For Home Security Alarm System, Magneti Door Switch, Sensor
Amazon.com
150
$16.99
Sonew 10Pcs NC Recessed Wired Door Window Sensor Magnetic Reed Switch For Home Security Alarm System, Magneti Door Switch, Sensor
Amazon.com
150
$33.50
UHPPOTE Wired Magnetic Contact Sensors For Door Window Alarm (20 Pack) | Normal Closed, Screw Terminal, Surface Mount
Amazon.com
15
$33.50
UHPPOTE Wired Magnetic Contact Sensors For Door Window Alarm (20 Pack) | Normal Closed, Screw Terminal, Surface Mount
Amazon.com
15
$34.99
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 10 Pcs | Authorizid
Intellid Products
$34.99
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 10 Pcs | Authorizid
Intellid Products
$26.50
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 5 Pcs | Authorizid
Intellid Products
$26.50
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 5 Pcs | Authorizid
Intellid Products
$34.99
RC-36 NC/NO Recessed Wired Magnetic Reed Switch, Brown Door Window Contact Sensor For Home Burglar Alarm Systems, 10 Sets
Amazon.com
3
$34.99
RC-36 NC/NO Recessed Wired Magnetic Reed Switch, Brown Door Window Contact Sensor For Home Burglar Alarm Systems, 10 Sets
Amazon.com
3
$17.99
Magnetic Reed Switch RC-33 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
21
$17.99
Magnetic Reed Switch RC-33 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
21
$29.99
$54.23
Wireless Door Window Alarm Kit, 90-100Db Magnetic Sensor Home Security System Alert For Store, Office, Living Room, Garage, Apartment And Bedroom,
Temu US
4
44% off
$29.99
$54.23
Wireless Door Window Alarm Kit, 90-100Db Magnetic Sensor Home Security System Alert For Store, Office, Living Room, Garage, Apartment And Bedroom,
Temu US
4
$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
$39.98
Ring Alarm Window And Door Contact Sensor
Wellbots
$39.98
Ring Alarm Window And Door Contact Sensor
Wellbots
$7.89
Magnetic Reed Switch MC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Magnetic Reed
Amazon.com
$7.89
Magnetic Reed Switch MC-31 NC Surface Mount Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Magnetic Reed
Amazon.com
$15.99
MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch - (6 Sets)
Amazon.com
$15.99
MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch - (6 Sets)
Amazon.com
$27.99
Window Alarm System 4-Pack - Ultra-Loud 120Db Alarms With Advanced Vibration Sensors - Window Security Alarms For Glass Break Detection - Features Low
Amazon.com
744
$27.99
Window Alarm System 4-Pack - Ultra-Loud 120Db Alarms With Advanced Vibration Sensors - Window Security Alarms For Glass Break Detection - Features Low
Amazon.com
744
$8.59
2 Sets MC-33Cnormally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch Home Security Burglar Alarm System
Amazon.com
$8.59
2 Sets MC-33Cnormally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch Home Security Burglar Alarm System
Amazon.com
$49.99
Door And Window Alarm For Home Wireless Alarms Security System Magnetic Alarm Sensor Close Door Reminder Loud 110 DB, 4-In-1 Mode Window Alarms 10
Temu US
$49.99
Door And Window Alarm For Home Wireless Alarms Security System Magnetic Alarm Sensor Close Door Reminder Loud 110 DB, 4-In-1 Mode Window Alarms 10
Temu US
$69.99
Secure Wireless Indoor Alarm Door And Window Smart Contact Sensor, White (2-Pack)
Home Depot
Free shipping
$69.99
Secure Wireless Indoor Alarm Door And Window Smart Contact Sensor, White (2-Pack)
Home Depot
Free shipping
$24.99
Hxchen 5Sets RC-36 NC+NO Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Brown
Amazon.com
15
$24.99
Hxchen 5Sets RC-36 NC+NO Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Brown
Amazon.com
15
$19.26
$29.99
2Pcs Tuya Smart Door & Window Sensor - Wireless Magnetic Alarm, Compatible With Smart Life APP, Battery Powered, Real-Time Alarm, Easy DIY
Temu US
35% off
$19.26
$29.99
2Pcs Tuya Smart Door & Window Sensor - Wireless Magnetic Alarm, Compatible With Smart Life APP, Battery Powered, Real-Time Alarm, Easy DIY
Temu US
$7.99
MC-38 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, For Home Security And Burglar Alarm Systems, Sets Of 2,
Amazon.com
36
$7.99
MC-38 NC Surface Mount Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch, For Home Security And Burglar Alarm Systems, Sets Of 2,
Amazon.com
36
$7.89
Bnafes Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs
Amazon.com
45
$7.89
Bnafes Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs
Amazon.com
45
$27.99
Window Glass Door Alarm (2-Pack)
Home Depot
Free shipping
$27.99
Window Glass Door Alarm (2-Pack)
Home Depot
Free shipping
$38.61
Alula RE601 Door Window Sensor Connect+ Encrypted
Advanced Security
$38.61
Alula RE601 Door Window Sensor Connect+ Encrypted
Advanced Security
$8.19
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC35
Amazon.com
10
$8.19
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC35
Amazon.com
10
$37.69
Simplisafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System
Walmart
Free shipping
$37.69
Simplisafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System
Walmart
Free shipping
$16.14
Home Security Wireless Door/Window Sensor
Home Depot
Free shipping
$16.14
Home Security Wireless Door/Window Sensor
Home Depot
Free shipping
$39.94
(2 Pack) Homezone Wi-Fi Smart Wireless Window And Door Sensor With App Alerts, White
Walmart
Free shipping
$39.94
(2 Pack) Homezone Wi-Fi Smart Wireless Window And Door Sensor With App Alerts, White
Walmart
Free shipping
$7.99
GDQLCNXB 2 Sets MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch
Amazon.com
4
$7.99
GDQLCNXB 2 Sets MC-33C Normally Closed Recessed Window Door Contact Sensor Alarm Magnetic Reed Switch
Amazon.com
4
Check Out How Easy Install is for These Alarms | Security Door Window Alarm, Wireless Sensor
0:59
Check Out How Easy Install is for These Alarms | Security Door Window Alarm, Wireless Sensor
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YouTubeSam K. Creates
Ring Alarm: Rename Door & Window Sensors 2026
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Ring Alarm: Rename Door & Window Sensors 2026
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YouTubeSafe & Sound Systems Inc
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YouTubeFull Circle Farm Finds
Aura HomeSystems – Door Sensor Alarm & Push Notification Demo
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Aura HomeSystems – Door Sensor Alarm & Push Notification Demo
223 views1 month ago
YouTubePlamen Petrov
Defiant Smart Home Alarm Kit with WiFi and Bluetooth (5-Piece), Door/Window Sensor (2-Pack) and Motion Sensor Alarm (1-Pack) - The Home Depot
Defiant Smart Home Alarm Kit with WiFi and Bluetooth (5-Piece), Door/Window Sensor (2-Pack) and Motion Sensor Alarm (1-Pack) - The Home Depot
11 months ago
homedepot.com
Door window magnetic sensor for alarm circuit 🔥#CircuitStories #electronics #DoorAlarm #ReedSwitch
0:16
Door window magnetic sensor for alarm circuit 🔥#CircuitStories #electronics #DoorAlarm #ReedSwitch
1.9K views1 month ago
YouTubeCircuit Stories
See these? Old window sensors from a previous alarm. Removing these won’t be a problem.
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See these? Old window sensors from a previous alarm. Removing these won’t be a problem.
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YouTubeHome Love Construction
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Renault Kwid Power Window & Remote Central Locking Installation | Car Alarm System | Palki BT Road
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YouTubeSKILL MUMBAI
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Ring Alarm: How to Bypass a Door or Window (2026 App)
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Accidents happen, but Ring Outside Door Sensors help you catch what you might miss. 🐶
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home security system #scienceproject #shorts #electronics #experiment
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YouTubeTech Ideas
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"Smart Door & Window Alarm – Easy Installation, Maximum Security!"
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Smart Security Burglar Alarm Circuit | DIY Home Security Alarm System #viral #shorts
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Reed Magnetic Sensor Door Security Alarm ❤️ DIY Ideas 💡 Science Project #diy #shorts #ytshorts
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I Just Installed a Verisure Alarm—Here’s How It Actually Works!
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# 🚨 Security Alarm System Using LDR Sensor | Arduino Project #scienceproject #diyprojects#innovation
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Shop Window Sensors for Alarm Systems

Sponsored
About our ads
$11.66
7939WG-WH - Ademco Surface Mount Contacts (White) | Ademco 7939WG-WH Surface Mount Contacts, White Reliable Door/Window Sensor For Residential And
Amazon.com
358
$11.66
7939WG-WH - Ademco Surface Mount Contacts (White) | Ademco 7939WG-WH Surface Mount Contacts, White Reliable Door/Window Sensor For Residential And
Amazon.com
358
$19.99
$29.98
Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
Amazon.com
27K+
33% off
$19.99
$29.98
Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
Amazon.com
27K+
$27.99
RC-35 NC/NO Recessed Wired Door Window Magnetic Reed Contact Sensor, Home Burglar Security Alarm, 6 Sets
Amazon.com
19
$27.99
RC-35 NC/NO Recessed Wired Door Window Magnetic Reed Contact Sensor, Home Burglar Security Alarm, 6 Sets
Amazon.com
19
$6.99
Hxchen MC-38 Door Window Contact Sensor Alarm Magnetic Reed Switch With Screws White - (2 Sets)
Amazon.com
49
$6.99
Hxchen MC-38 Door Window Contact Sensor Alarm Magnetic Reed Switch With Screws White - (2 Sets)
Amazon.com
49
$23.99
Sanjie Door Window Alarm Sensors, 3 Pack, 125Db, Volume Control | 125Db Wireless Sensors Alert When Doors Or Windows Open, With Adjustable Volume,
Amazon.com
446
$23.99
Sanjie Door Window Alarm Sensors, 3 Pack, 125Db, Volume Control | 125Db Wireless Sensors Alert When Doors Or Windows Open, With Adjustable Volume,
Amazon.com
446
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
2
$17.99
Sopepoyie RC-36 NC/NO Recessed Wired Security Window Door Contact Sensor Brown Alarm Magnetic Reed Switch 5 Sets
Amazon.com
2
$19.99
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
Amazon.com
129
$19.99
Uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10Pcs
Amazon.com
129
$19.99
GAGALOR 20 Sets NC Magnetic Contacts Window Door Sensor Surface-Mounted Reed Switch Alarm With Double Side Tape
Amazon.com
13
$19.99
GAGALOR 20 Sets NC Magnetic Contacts Window Door Sensor Surface-Mounted Reed Switch Alarm With Double Side Tape
Amazon.com
13
$8.97
QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack Of 10 With 40 Screws
Amazon.com
328
$8.97
QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack Of 10 With 40 Screws
Amazon.com
328
$43.66
$49.88
15 Sets Of High Decibel Window And Door Magnetic Alarm Sensors For Home Security Systems, Easy To Install, Can Be Attached To Windows Or Doors,
Temu US
12% off
$43.66
$49.88
15 Sets Of High Decibel Window And Door Magnetic Alarm Sensors For Home Security Systems, Easy To Install, Can Be Attached To Windows Or Doors,
Temu US
$16.99
Sonew 10Pcs NC Recessed Wired Door Window Sensor Magnetic Reed Switch For Home Security Alarm System, Magneti Door Switch, Sensor
Amazon.com
150
$16.99
Sonew 10Pcs NC Recessed Wired Door Window Sensor Magnetic Reed Switch For Home Security Alarm System, Magneti Door Switch, Sensor
Amazon.com
150
$33.50
UHPPOTE Wired Magnetic Contact Sensors For Door Window Alarm (20 Pack) | Normal Closed, Screw Terminal, Surface Mount
Amazon.com
15
$33.50
UHPPOTE Wired Magnetic Contact Sensors For Door Window Alarm (20 Pack) | Normal Closed, Screw Terminal, Surface Mount
Amazon.com
15
$34.99
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 10 Pcs | Authorizid
Intellid Products
$34.99
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - 10 Pcs | Authorizid
Intellid Products
$26.50
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 5 Pcs | Authorizid
Intellid Products
$26.50
Door Contacts Surface Mount NC Security Alarm Window Sensors With Magnetic Reed Switch - Grey, 5 Pcs | Authorizid
Intellid Products
$34.99
RC-36 NC/NO Recessed Wired Magnetic Reed Switch, Brown Door Window Contact Sensor For Home Burglar Alarm Systems, 10 Sets
Amazon.com
3
$34.99
RC-36 NC/NO Recessed Wired Magnetic Reed Switch, Brown Door Window Contact Sensor For Home Burglar Alarm Systems, 10 Sets
Amazon.com
3
$17.99
Magnetic Reed Switch RC-33 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
21
$17.99
Magnetic Reed Switch RC-33 NC/NO Recessed Wired Door Window Alarm, Magneti Door Switch, Contact Sensor, For Home Security And Burglar Alarm Systems,
Amazon.com
21
$29.99
$54.23
Wireless Door Window Alarm Kit, 90-100Db Magnetic Sensor Home Security System Alert For Store, Office, Living Room, Garage, Apartment And Bedroom,
Temu US
4
44% off
$29.99
$54.23
Wireless Door Window Alarm Kit, 90-100Db Magnetic Sensor Home Security System Alert For Store, Office, Living Room, Garage, Apartment And Bedroom,
Temu US
4
$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