Shop window sensors

Sponsored
About our ads
$89.94
$99.99
Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
Amazon.com
26K+
Free shipping
10% off
$89.94
$99.99
Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
Amazon.com
26K+
$69.99
Ring Alarm Glass Break Sensor - 2-Pack
Amazon.com
1K+
Free shipping
$69.99
Ring Alarm Glass Break Sensor - 2-Pack
Amazon.com
1K+
$52.90
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
141
Free shipping
$52.90
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
141
$115.00
PLASTIC FOOD WINDOW DUALIS-E21166 EFECTOR - Sensors & Switches & Photoelectric Supplies
Radwell.com
$115.00
PLASTIC FOOD WINDOW DUALIS-E21166 EFECTOR - Sensors & Switches & Photoelectric Supplies
Radwell.com
$29.98
$39.99
Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
Amazon.com
28K+
25% off
$29.98
$39.99
Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
Amazon.com
28K+
$123.30
LASERPROTECTION WINDOW DUALIS-E21169 EFECTOR - Sensors & Switches & Sensor Accessory Supplies
Radwell.com
$123.30
LASERPROTECTION WINDOW DUALIS-E21169 EFECTOR - Sensors & Switches & Sensor Accessory Supplies
Radwell.com
$54.99
Simplisafe Entry Sensor (Pack Of 4) - Window And Door Protection - Compatible With The Simplisafe Home Security System - Latest Gen
Amazon.com
2K+
Free shipping
$54.99
Simplisafe Entry Sensor (Pack Of 4) - Window And Door Protection - Compatible With The Simplisafe Home Security System - Latest Gen
Amazon.com
2K+
$29.99
$32.99
Door Alarms For Kids Safety, 6 Pack 120Db Pool Alarm Sensor For Doors And Windows, Window Alarms For Home Security, Burglar Intruder Entry Alert For
Amazon.com
600
$29.99
$32.99
Door Alarms For Kids Safety, 6 Pack 120Db Pool Alarm Sensor For Doors And Windows, Window Alarms For Home Security, Burglar Intruder Entry Alert For
Amazon.com
600
$14.99
$19.99
Ring Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy
Amazon.com
28K+
25% off
$14.99
$19.99
Ring Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy
Amazon.com
28K+
$42.45
$47.10
Safety Technology International, Inc. STI-3360 Wireless Entry Alert Chime With Receiver, Door Or Window Transmitter Sensor STI-3353 Receiver Sold
Amazon.com
Free shipping
$42.45
$47.10
Safety Technology International, Inc. STI-3360 Wireless Entry Alert Chime With Receiver, Door Or Window Transmitter Sensor STI-3353 Receiver Sold
Amazon.com
Free shipping
$24.99
$39.99
OSI Wireless Contact Sensors (Gen 2) White, Accessory For OSI Smart Alarm System (Gen 2), Wi-Fi Wireless Door & Window Sensor, With 3m Adhesive, Use
Amazon.com
4
37% off
$24.99
$39.99
OSI Wireless Contact Sensors (Gen 2) White, Accessory For OSI Smart Alarm System (Gen 2), Wi-Fi Wireless Door & Window Sensor, With 3m Adhesive, Use
Amazon.com
4
$128.00
WINDOW SICK - Sensors & Switches & Photoelectric Supplies
Radwell.com
$128.00
WINDOW SICK - Sensors & Switches & Photoelectric Supplies
Radwell.com
$22.99
Door Alarms When Opened For Kids Safety, 4 Pack 120Db Loud Window Sensors For Home Security, Pool Alarms, Door Alarm Sensor For House Hotel Sheds
Amazon.com
1K+
$22.99
Door Alarms When Opened For Kids Safety, 4 Pack 120Db Loud Window Sensors For Home Security, Pool Alarms, Door Alarm Sensor For House Hotel Sheds
Amazon.com
1K+
$29.99
Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
Amazon.com
1K+
$29.99
Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
Amazon.com
1K+
$79.99
Ecobee Smart Sensor For Doors & Windows 2 Pack - Wifi Contact Sensor For Home Security, Energy Savings - Compatible With Smart Thermostats -
Amazon.com
394
Free shipping
$79.99
Ecobee Smart Sensor For Doors & Windows 2 Pack - Wifi Contact Sensor For Home Security, Energy Savings - Compatible With Smart Thermostats -
Amazon.com
394
$39.00
Yardgard Door And Window Pool Alarm, Child Safety UL 2017 Compliant Alarm For Pool Gates And Sliding Doors, Weatherproof, Wireless, Work As A UL
Amazon.com
762
Free shipping
$39.00
Yardgard Door And Window Pool Alarm, Child Safety UL 2017 Compliant Alarm For Pool Gates And Sliding Doors, Weatherproof, Wireless, Work As A UL
Amazon.com
762
$191.76
FRONT WINDOW F.INSPECTOR SICK - Sensors & Switches & Sensor Accessory Supplies
Radwell.com
$191.76
FRONT WINDOW F.INSPECTOR SICK - Sensors & Switches & Sensor Accessory Supplies
Radwell.com
$6.98
$14.20
5PCS Wired Door Window Sensor Detector Magnetic Door Contact Sensor Switch For Burglar Alarm System
Aliexpress
50% off
$6.98
$14.20
5PCS Wired Door Window Sensor Detector Magnetic Door Contact Sensor Switch For Burglar Alarm System
Aliexpress
$6.83
1PC 2PCS 3PCS 5PCS Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm
Aliexpress
Free shipping
$6.83
1PC 2PCS 3PCS 5PCS Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm
Aliexpress
Free shipping
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
45
$19.99
Tokatuker NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch For Alarm System Access Control Replace
Amazon.com
45
$5.95
5PCS Magnetic Door Window Contact Sensor Alarm Reed Switch Security Home Burglar Alarm NO/NC
Aliexpress
$5.95
5PCS Magnetic Door Window Contact Sensor Alarm Reed Switch Security Home Burglar Alarm NO/NC
Aliexpress
$62.76
King Electric KRF-WINDOW-SENSOR Radio Frequency Battery-Powered Window And Door Sensor For KRFTP Thermostats | Supplyhouse.Com
SupplyHouse.com
$62.76
King Electric KRF-WINDOW-SENSOR Radio Frequency Battery-Powered Window And Door Sensor For KRFTP Thermostats | Supplyhouse.Com
SupplyHouse.com
$5.92
Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm Smart Life Magnetic
Aliexpress
$5.92
Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm Smart Life Magnetic
Aliexpress
$9.89
$27.59
130DB Door Window Entry Alarm Wireless Remote Control Door Sensor Alarm Host Burglar Security Alarm
Aliexpress
Free shipping
64% off
$9.89
$27.59
130DB Door Window Entry Alarm Wireless Remote Control Door Sensor Alarm Host Burglar Security Alarm
Aliexpress
Free shipping
$16.62
$32.46
Door Window Wireless Burglar Alarm With Magnetic Sensor Alarm 108Db High Volume Door Open Detectors
Aliexpress
48% off
$16.62
$32.46
Door Window Wireless Burglar Alarm With Magnetic Sensor Alarm 108Db High Volume Door Open Detectors
Aliexpress
$20.00
4Pcs Zigbee Door Window Sensor Alarm Detector Burglar Magnetic Contact Open Close APP Remote
Aliexpress
Free shipping
$20.00
4Pcs Zigbee Door Window Sensor Alarm Detector Burglar Magnetic Contact Open Close APP Remote
Aliexpress
Free shipping
$15.79
$19.99
2Pcs 433Mhz/868Mhz Wireless Door Contact Window Sensor Magnetic Contact MD-210R For Focus ST-VGT
Aliexpress
Free shipping
21% off
$15.79
$19.99
2Pcs 433Mhz/868Mhz Wireless Door Contact Window Sensor Magnetic Contact MD-210R For Focus ST-VGT
Aliexpress
Free shipping
$482.46
SLS-WINDOW DATALOGIC - Sensors & Switches & Sensor Accessory Supplies
Radwell.com
$482.46
SLS-WINDOW DATALOGIC - Sensors & Switches & Sensor Accessory Supplies
Radwell.com
$28.08
American Lighting Spektrum Plus Door And Window Sensor 3V/CR2 Lithium Battery 15mm Detection Distance (SPKPL-SNS-CNTCT-WH)
Lighting Supply
60-day returns (most items)
$28.08
American Lighting Spektrum Plus Door And Window Sensor 3V/CR2 Lithium Battery 15mm Detection Distance (SPKPL-SNS-CNTCT-WH)
Lighting Supply
60-day returns
$6.22
Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm Smart Life Magnetic
Aliexpress
Free shipping
$6.22
Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm Smart Life Magnetic
Aliexpress
Free shipping
$120.00
$240.00
Wireless Door & Window Sensor 433Mhz Open Door Detector For Smart Alarm Systems - 10Pcs | Inspire Picks
Inspire Uplift
Free shipping
50% off
$120.00
$240.00
Wireless Door & Window Sensor 433Mhz Open Door Detector For Smart Alarm Systems - 10Pcs | Inspire Picks
Inspire Uplift
Free shipping
$5.36
ONENUO Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm Smart Life
Aliexpress
$5.36
ONENUO Tuya Wifi Door Sensor Window Entry Sensor Security Burglar Door Sensor Alarm Smart Life
Aliexpress
$8.81
Awapow Wireless Door Window Magnetic Sensor Alarm 130Db Anti-Theft With Remote Control Detectors
Aliexpress
$8.81
Awapow Wireless Door Window Magnetic Sensor Alarm 130Db Anti-Theft With Remote Control Detectors
Aliexpress
$0.33
$0.43
MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System Detector Reed Switch
Aliexpress
Free shipping
23% off
$0.33
$0.43
MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System Detector Reed Switch
Aliexpress
Free shipping
$89.99
$99.99
Ring Alarm Window And Door Contact Sensor 6-Pack (2Nd Gen) In White | 4SD6SZ-0EN0
Lowe's
10% off
$89.99
$99.99
Ring Alarm Window And Door Contact Sensor 6-Pack (2Nd Gen) In White | 4SD6SZ-0EN0
Lowe's
$19.23
Feit Electric Battery-Powered Smart Wi-Fi Door Window Sensor (MOT/DOOR/WIFI/BAT)
Lighting Supply
60-day returns (most items)
$19.23
Feit Electric Battery-Powered Smart Wi-Fi Door Window Sensor (MOT/DOOR/WIFI/BAT)
Lighting Supply
60-day returns
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    Shop window sensors

    Sponsored
    About our ads
    $89.94
    $99.99
    Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
    Amazon.com
    26K+
    Free shipping
    10% off
    $89.94
    $99.99
    Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy
    Amazon.com
    26K+
    $69.99
    Ring Alarm Glass Break Sensor - 2-Pack
    Amazon.com
    1K+
    Free shipping
    $69.99
    Ring Alarm Glass Break Sensor - 2-Pack
    Amazon.com
    1K+
    $52.90
    2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
    Amazon.com
    141
    Free shipping
    $52.90
    2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
    Amazon.com
    141
    $115.00
    PLASTIC FOOD WINDOW DUALIS-E21166 EFECTOR - Sensors & Switches & Photoelectric Supplies
    Radwell.com
    $115.00
    PLASTIC FOOD WINDOW DUALIS-E21166 EFECTOR - Sensors & Switches & Photoelectric Supplies
    Radwell.com
    $29.98
    $39.99
    Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
    Amazon.com
    28K+
    25% off
    $29.98
    $39.99
    Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base
    Amazon.com
    28K+
    $123.30
    LASERPROTECTION WINDOW DUALIS-E21169 EFECTOR - Sensors & Switches & Sensor Accessory Supplies
    Radwell.com
    $123.30
    LASERPROTECTION WINDOW DUALIS-E21169 EFECTOR - Sensors & Switches & Sensor Accessory Supplies
    Radwell.com
    $54.99
    Simplisafe Entry Sensor (Pack Of 4) - Window And Door Protection - Compatible With The Simplisafe Home Security System - Latest Gen
    Amazon.com
    2K+
    Free shipping
    $54.99
    Simplisafe Entry Sensor (Pack Of 4) - Window And Door Protection - Compatible With The Simplisafe Home Security System - Latest Gen
    Amazon.com
    2K+
    $29.99
    $32.99
    Door Alarms For Kids Safety, 6 Pack 120Db Pool Alarm Sensor For Doors And Windows, Window Alarms For Home Security, Burglar Intruder Entry Alert For
    Amazon.com
    600
    $29.99
    $32.99
    Door Alarms For Kids Safety, 6 Pack 120Db Pool Alarm Sensor For Doors And Windows, Window Alarms For Home Security, Burglar Intruder Entry Alert For
    Amazon.com
    600
    $14.99
    $19.99
    Ring Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy
    Amazon.com
    28K+
    25% off
    $14.99
    $19.99
    Ring Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy
    Amazon.com
    28K+
    $42.45
    $47.10
    Safety Technology International, Inc. STI-3360 Wireless Entry Alert Chime With Receiver, Door Or Window Transmitter Sensor STI-3353 Receiver Sold
    Amazon.com
    Free shipping
    $42.45
    $47.10
    Safety Technology International, Inc. STI-3360 Wireless Entry Alert Chime With Receiver, Door Or Window Transmitter Sensor STI-3353 Receiver Sold
    Amazon.com
    Free shipping
    $24.99
    $39.99
    OSI Wireless Contact Sensors (Gen 2) White, Accessory For OSI Smart Alarm System (Gen 2), Wi-Fi Wireless Door & Window Sensor, With 3m Adhesive, Use
    Amazon.com
    4
    37% off
    $24.99
    $39.99
    OSI Wireless Contact Sensors (Gen 2) White, Accessory For OSI Smart Alarm System (Gen 2), Wi-Fi Wireless Door & Window Sensor, With 3m Adhesive, Use
    Amazon.com
    4
    $128.00
    WINDOW SICK - Sensors & Switches & Photoelectric Supplies
    Radwell.com
    $128.00
    WINDOW SICK - Sensors & Switches & Photoelectric Supplies
    Radwell.com
    $22.99
    Door Alarms When Opened For Kids Safety, 4 Pack 120Db Loud Window Sensors For Home Security, Pool Alarms, Door Alarm Sensor For House Hotel Sheds
    Amazon.com
    1K+
    $22.99
    Door Alarms When Opened For Kids Safety, 4 Pack 120Db Loud Window Sensors For Home Security, Pool Alarms, Door Alarm Sensor For House Hotel Sheds
    Amazon.com
    1K+
    $29.99
    Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
    Amazon.com
    1K+
    $29.99
    Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use
    Amazon.com
    1K+
    $79.99
    Ecobee Smart Sensor For Doors & Windows 2 Pack - Wifi Contact Sensor For Home Security, Energy Savings - Compatible With Smart Thermostats -
    Amazon.com
    394
    Free shipping
    $79.99
    Ecobee Smart Sensor For Doors & Windows 2 Pack - Wifi Contact Sensor For Home Security, Energy Savings - Compatible With Smart Thermostats -
    Amazon.com
    394
    $39.00
    Yardgard Door And Window Pool Alarm, Child Safety UL 2017 Compliant Alarm For Pool Gates And Sliding Doors, Weatherproof, Wireless, Work As A UL
    Amazon.com
    762
    Free shipping
    $39.00
    Yardgard Door And Window Pool Alarm, Child Safety UL 2017 Compliant Alarm For Pool Gates And Sliding Doors, Weatherproof, Wireless, Work As A UL
    Amazon.com
    762
    $191.76
    FRONT WINDOW F.INSPECTOR SICK - Sensors & Switches & Sensor Accessory Supplies
    Radwell.com
    $191.76
    FRONT WINDOW F.INSPECTOR SICK - Sensors & Switches & Sensor Accessory Supplies
    Radwell.com
    $6.98
    $14.20
    5PCS Wired Door Window Sensor Detector Magnetic Door Contact Sensor Switch For Burglar Alarm System
    Aliexpress
    50% off
    $6.98
    $14.20
    5PCS Wired Door Window Sensor Detector Magnetic Door Contact Sensor Switch For Burglar Alarm System
    Aliexpress