Door Ajar Sensor(113)
Uses item details. Price when purchased online
N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 10pcs $18.71 Was $20.79
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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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In 25+ people's carts Philips Personal Security Window and Door Alarm, 2-Pack, White From $15.97
2 options
Available in additional 2 optionsFrom$1597
Philips Personal Security Window and Door Alarm, 2-Pack, White
7814.5 out of 5 Stars. 781 reviews
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Sgokeen Wireless Door Sensor Door Entry Chime, Door Open Alert with 600ft Range LED Indicators Receivers + Sensors Wireless Door Alarm,58 Ringtones Black From $13.98
From$1398
Sgokeen Wireless Door Sensor Door Entry Chime, Door Open Alert with 600ft Range LED Indicators Receivers + Sensors Wireless Door Alarm,58 Ringtones Black
924.2 out of 5 Stars. 92 reviews
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Homezone Wi-Fi Smart Wireless Window/Door Alarm Sensor, White, 1 Alarm Included From $19.97
2 options
Available in additional 2 optionsFrom$1997
Homezone Wi-Fi Smart Wireless Window/Door Alarm Sensor, White, 1 Alarm Included
344.3 out of 5 Stars. 34 reviews
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Best seller Vivint dw12 window and door sensor $29.99
$2999
current price $29.99Vivint dw12 window and door sensor
25 out of 5 Stars. 2 reviews
3-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black) $42.21
$4221
current price $42.213-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black)
Best seller Door Window Alarm, Personal Security Window, Burglar Alarm, Home Security Wireless Magnetic Sensor Anti-Theft Alarm (6 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 (6 Pcs) Home Alarm(Batteries not included)
1643.8 out of 5 Stars. 164 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
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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Best seller KFFKFF Wireless Door Chime, DC 12V, Entry Alert System with 656 ft Range, 58 Melodies & 5 Adjustable Volume Levels, Door Sensor Alarm for Business, Store, Home, or Office Use $16.99 $16.99/ca
$1699
current price $16.99$16.99/ca
KFFKFF Wireless Door Chime, DC 12V, Entry Alert System with 656 ft Range, 58 Melodies & 5 Adjustable Volume Levels, Door Sensor Alarm for Business, Store, Home, or Office Use
73.9 out of 5 Stars. 7 reviews
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Clearance Door Window Alarm, 95DB Door Alarms for Kids Safety, Wireless Sensor Door Window Burglar Alarm-Window Pool Alarms for Home (3 Pack) Was $7.94
Door Window Alarm, 95DB Door Alarms for Kids Safety, Wireless Sensor Door Window Burglar Alarm-Window Pool Alarms for Home (3 Pack)
433.9 out of 5 Stars. 43 reviews
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
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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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
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
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
Wsdcam Window Alarm Ultra-Slim Glass Break Sensor 125dB Home Security Alarm System-4 Pack From $22.97
From$2297
Wsdcam Window Alarm Ultra-Slim Glass Break Sensor 125dB Home Security Alarm System-4 Pack
464.3 out of 5 Stars. 46 reviews
3-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black) $59.48
$5948
current price $59.483-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black)
CallToU Caregiver Pager 500FT Door Sensor Alarm for Dementia, Alzheimers, Patients & Home Safety $33.99
$3399
current price $33.99CallToU Caregiver Pager 500FT Door Sensor Alarm for Dementia, Alzheimers, Patients & Home Safety
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Best seller SABRE Door Handle Alarm 110dB Door Alarm for Home Security, 8 in x 6 in x 1 in, 0.2 lb $9.79 Was $12.79
Now$979
current price Now $9.79, Was $12.79$12.79
SABRE Door Handle Alarm 110dB Door Alarm for Home Security, 8 in x 6 in x 1 in, 0.2 lb
1994.1 out of 5 Stars. 199 reviews
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GJX Wireless Home Alarm System Window Door Sensor Entry Other Timer White $5.89
$589
current price $5.89GJX Wireless Home Alarm System Window Door Sensor Entry Other Timer White
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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Surface Mount Wired NC Door Contact Sensor Alarm for Door Window Cabinets 10pcs $11.97
$1197
current price $11.97Surface Mount Wired NC Door Contact Sensor Alarm for Door Window Cabinets 10pcs
Bitiwend Door Chime, Wireless Door Alarm Sensor with 600ft Range 58 Chimes Adjustable Volume Mute Mode LED Indicators, $14.58
$1458
current price $14.58Bitiwend Door Chime, Wireless Door Alarm Sensor with 600ft Range 58 Chimes Adjustable Volume Mute Mode LED Indicators,
634.4 out of 5 Stars. 63 reviews
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Door Chime, GreenCycle Magnetic Sensor Wireless Door Chime Bell, Wireless Door Open Contact Sensor Alarm Chime with 600FT Range 48 Chimes 5 Volume Levels Night Light Function IP66 Waterproof From $17.99
From$1799
Door Chime, GreenCycle Magnetic Sensor Wireless Door Chime Bell, Wireless Door Open Contact Sensor Alarm Chime with 600FT Range 48 Chimes 5 Volume Levels Night Light Function IP66 Waterproof
434.3 out of 5 Stars. 43 reviews
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CallToU Portable Door Chime with 4 Door Sensors and 1 Receiver, 500ft Range, 2 Chime Tones & Adjustable Vibration, Entry Alert for Home, Office, or Business
2 options
Available in additional 2 optionsCallToU Portable Door Chime with 4 Door Sensors and 1 Receiver, 500ft Range, 2 Chime Tones & Adjustable Vibration, Entry Alert for Home, Office, or Business
11 out of 5 Stars. 1 reviews
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Door Window Alarm Wireless Magnetic Sensor Burglar Alert 90dB pack of 10 From $15.78
5 options
Available in additional 5 optionsFrom$1578
Door Window Alarm Wireless Magnetic Sensor Burglar Alert 90dB pack of 10
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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Kchsji WiFi Door Window Sensor Alarm Magnetic Contact Switch Smart Home Security Detector, Instant Phone Alert for Front Garage Cabinet Drawer, 2.4GHz Wireless App Control No Hub Required Was $9.99
Kchsji WiFi Door Window Sensor Alarm Magnetic Contact Switch Smart Home Security Detector, Instant Phone Alert for Front Garage Cabinet Drawer, 2.4GHz Wireless App Control No Hub Required
3-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black) $42.21
$4221
current price $42.213-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black)
GREENCYCLE Motion Sensor Doorbell, Door Chime for Business Entry, Store Welcome Buzzer Monitor,Motion Sensor Detect Alarm, Caregiver Reminder for Elderly, Visitor Bell - 1 Receiver 1 Motion Sensor From $21.63
From$2163
GREENCYCLE Motion Sensor Doorbell, Door Chime for Business Entry, Store Welcome Buzzer Monitor,Motion Sensor Detect Alarm, Caregiver Reminder for Elderly, Visitor Bell - 1 Receiver 1 Motion Sensor
744.6 out of 5 Stars. 74 reviews
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GJX 2026 New Touch Sensor Alarm, Vibration Door Alarm, 120Db Touch Sensor Door Handle Alarm Anti-Theft Vibration Window Burglar Alert Home Security $9.33
$933
current price $9.33GJX 2026 New Touch Sensor Alarm, Vibration Door Alarm, 120Db Touch Sensor Door Handle Alarm Anti-Theft Vibration Window Burglar Alert Home Security
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
Wireless Home Security Driveway Alarm, Motion Sensor Detect Alert, Store Door Entry Chime Doorbell with 1 PIR Motion Sensor Detectors and 1 Wireless Plug-in Receiver for Front Doors Window Frames $14.98
$1498
current price $14.98Wireless Home Security Driveway Alarm, Motion Sensor Detect Alert, Store Door Entry Chime Doorbell with 1 PIR Motion Sensor Detectors and 1 Wireless Plug-in Receiver for Front Doors Window Frames
74.3 out of 5 Stars. 7 reviews
YoLink LoRa Smart Door & Window Sensor: Up to 1/4 Mile Open-Air Range, Door Left-Open Reminders, up to 5 Year Battery Life, Alexa, IFTTT, Home Assistant, Home Security From $16.95
6 options
Available in additional 6 optionsFrom$1695
YoLink LoRa Smart Door & Window Sensor: Up to 1/4 Mile Open-Air Range, Door Left-Open Reminders, up to 5 Year Battery Life, Alexa, IFTTT, Home Assistant, Home Security
334.6 out of 5 Stars. 33 reviews
SanJie Door Sensor Chime When Door Opens, Door Entry Chime for Business/Home/Office/Store,500 FT Range,26 Chimes 5 Adjustable Volume Door Ringer Alert 2 Sensors + 1 Receivers $24.99
$2499
current price $24.99SanJie Door Sensor Chime When Door Opens, Door Entry Chime for Business/Home/Office/Store,500 FT Range,26 Chimes 5 Adjustable Volume Door Ringer Alert 2 Sensors + 1 Receivers
45 out of 5 Stars. 4 reviews
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Door Window Alarm, 90DB Door Alarms for Kids Safety, Door Window Burglar Alarm-Window Pool Alarms for Home (2 Pack)
3 options
Available in additional 3 optionsDoor Window Alarm, 90DB Door Alarms for Kids Safety, Door Window Burglar Alarm-Window Pool Alarms for Home (2 Pack)
293.5 out of 5 Stars. 29 reviews
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3-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black) $42.21
$4221
current price $42.213-in-1 Alarm - Door Left Open Chime with Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 to 120 dB, Time Delay Alert for Freezer, Gate, Shop. (Black)
CallTou Wireless Door Sensor Alarm Wander Alert for Dementia Elderly Patient Alzheimer Door Open Chime Monitoring for Caregiver Home Care $39.99
$3999
current price $39.99CallTou Wireless Door Sensor Alarm Wander Alert for Dementia Elderly Patient Alzheimer Door Open Chime Monitoring for Caregiver Home Care
42.3 out of 5 Stars. 4 reviews
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Honeywell Home 5816WMWH Wireless Door/ Window Sensor Was $35.49
Honeywell Home 5816WMWH Wireless Door/ Window Sensor
35 out of 5 Stars. 3 reviews
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Fosmon WaveLink Wireless Door Bell Alarm For Home Security System, Business, Elderly, Kids & More, Door Alarms When Opened, 2 Battery Operated Entry Alert Door Chime Sensor, 1 Plug In Receiver $24.99
$2499
current price $24.99Fosmon WaveLink Wireless Door Bell Alarm For Home Security System, Business, Elderly, Kids & More, Door Alarms When Opened, 2 Battery Operated Entry Alert Door Chime Sensor, 1 Plug In Receiver
143.4 out of 5 Stars. 14 reviews
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Wireless Door Window Sensor for Home – 90 dB Burglar Alert with Magnetic Sensor, Peel and Stick Installation
Wireless Door Window Sensor for Home – 90 dB Burglar Alert with Magnetic Sensor, Peel and Stick Installation
SimpliSafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System $42.35
$4235
current price $42.35SimpliSafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System
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