Shop Sensors For Opening Doors

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$137.20
$342.92
Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
SimpliSafe, Inc.
Free shipping
59% off
$137.20
$342.92
Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
SimpliSafe, Inc.
Free shipping
$23.79
$27.99
Sanjie Wireless Door Chime Sensor, When Door Opens, Entry Alarm For Business/Home/Kids, 5 Adjustable Volume Ringer Alert 2 Sensors + 1 Receivers, 500
Amazon.com
266
15% off
$23.79
$27.99
Sanjie Wireless Door Chime Sensor, When Door Opens, Entry Alarm For Business/Home/Kids, 5 Adjustable Volume Ringer Alert 2 Sensors + 1 Receivers, 500
Amazon.com
266
$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
27K+
Free shipping
$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
27K+
$85.74
Safety Technology International, Inc. STI-6402 105 Db Exit Stopper® Multifunction Door Alarm For Double Doors With On/Off Switch And 9 Volt Battery
Amazon.com
107
Free shipping
$85.74
Safety Technology International, Inc. STI-6402 105 Db Exit Stopper® Multifunction Door Alarm For Double Doors With On/Off Switch And 9 Volt Battery
Amazon.com
107
$16.99
3In1 Alarm - Door Left Open Alarm, Doors Chime With Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alert, 80 To 120 Db, Close Door Reminder For
Amazon.com
352
$16.99
3In1 Alarm - Door Left Open Alarm, Doors Chime With Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alert, 80 To 120 Db, Close Door Reminder For
Amazon.com
352
$59.99
$71.79
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
133
Free shipping
16% off
$59.99
$71.79
2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
Amazon.com
133
$10.99
$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
26K+
45% off
$10.99
$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
26K+
$32.39
$35.99
Sanjie Door Chime, Door Open Contact Sensor Alarm For Business/Store/Home/Office When Entering, With 500 ft Range,26 Chimes 5 Adjustable Volume 2
Amazon.com
1K+
10% off
$32.39
$35.99
Sanjie Door Chime, Door Open Contact Sensor Alarm For Business/Store/Home/Office When Entering, With 500 ft Range,26 Chimes 5 Adjustable Volume 2
Amazon.com
1K+
$47.10
$56.00
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
15% off
$47.10
$56.00
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
$21.89
Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
Amazon.com
129
$21.89
Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
Amazon.com
129
$16.99
41A5034 Safety Sensor Kit, Replacement For Craftsman/Chamberlain/Liftmaster Garage Door Sensor, Compatible With Liftmaster/Chamberlain/Craftsman
Amazon.com
736
$16.99
41A5034 Safety Sensor Kit, Replacement For Craftsman/Chamberlain/Liftmaster Garage Door Sensor, Compatible With Liftmaster/Chamberlain/Craftsman
Amazon.com
736
$16.99
GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
Amazon.com
18
$16.99
GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
Amazon.com
18
$21.98
Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor With App Notification Alert, Contact Sensor For Home Security, Compatible
Amazon.com
9
$21.98
Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor With App Notification Alert, Contact Sensor For Home Security, Compatible
Amazon.com
9
$19.99
Wireless Motion Sensor Doorbell -Indoor Motion Detector Alarm, Door Chime For Business/Store/Office Entrance, Entry Alert Bell With Buzzer, USB/
Amazon.com
55
$19.99
Wireless Motion Sensor Doorbell -Indoor Motion Detector Alarm, Door Chime For Business/Store/Office Entrance, Entry Alert Bell With Buzzer, USB/
Amazon.com
55
$20.39
$23.99
Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry Alert
Amazon.com
2K+
15% off
$20.39
$23.99
Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry Alert
Amazon.com
2K+
$18.89
Door Window Alarm, 90Db Door Alarms Sensor For Kids Safety, Home Security, Door Window Burglar Alarm, Window Pool Alarms For Home, Apartments, Offices
Amazon.com
54
$18.89
Door Window Alarm, 90Db Door Alarms Sensor For Kids Safety, Home Security, Door Window Burglar Alarm, Window Pool Alarms For Home, Apartments, Offices
Amazon.com
54
$7.99
Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
Amazon.com
222
$7.99
Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
Amazon.com
222
$619.00
FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
Radwell.com
$619.00
FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
Radwell.com
$33.90
Tresco Door Sensor Recess/Surface Mount Nickel L-RSDS-NI-1
Woodworker's Hardware
$33.90
Tresco Door Sensor Recess/Surface Mount Nickel L-RSDS-NI-1
Woodworker's Hardware
$45.73
Tresco WLDS-NI Wireless Door Sensor Nickel
Woodworker's Hardware
$45.73
Tresco WLDS-NI Wireless Door Sensor Nickel
Woodworker's Hardware
$733.95
IS-40 BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Controller Supplies
Radwell.com
$733.95
IS-40 BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Controller Supplies
Radwell.com
$66.04
Tresco WLDSREC Wireless Door Sensor Receiver
Woodworker's Hardware
$66.04
Tresco WLDSREC Wireless Door Sensor Receiver
Woodworker's Hardware
$197.00
Detex Eax-300 | Door Propped Alarm | Exit Devices, Alarms & Panic Bars
Qualified Hardware
Free shipping
$197.00
Detex Eax-300 | Door Propped Alarm | Exit Devices, Alarms & Panic Bars
Qualified Hardware
Free shipping
$34.50
$59.00
Ajax Wireless Doorprotect Magnetic Door Opening Detector White
Shop Ajax Security
41% off
$34.50
$59.00
Ajax Wireless Doorprotect Magnetic Door Opening Detector White
Shop Ajax Security
$109.95
Eve Door & Window (Matter) - Wireless Contact Sensor - 3-Pack
Apple Store
840
Free shipping
$109.95
Eve Door & Window (Matter) - Wireless Contact Sensor - 3-Pack
Apple Store
840
$386.14
Security Door Controls Infrared Motion Sensor: 1 3/4 in Ht, 7 in Wd Model: MD-31DOW
Grainger
$386.14
Security Door Controls Infrared Motion Sensor: 1 3/4 in Ht, 7 in Wd Model: MD-31DOW
Grainger
$25.00
Liftmaster Operators Safety Sensor Kit (Newer Model) - DIY Garage Door Parts
DIY Garage Door Parts
$25.00
Liftmaster Operators Safety Sensor Kit (Newer Model) - DIY Garage Door Parts
DIY Garage Door Parts
$27.18
Safety Technology International Wireless Entry Alert Sensor: Surface/Wall, Alkaline Model: STI-3551
Grainger
$27.18
Safety Technology International Wireless Entry Alert Sensor: Surface/Wall, Alkaline Model: STI-3551
Grainger
$58.99
Door Chime, DC 12V, Wireless Door Open Contact Sensor Alarm Chime With 656 ft. Range, Remote Control With App
Home Depot
Free shipping
$58.99
Door Chime, DC 12V, Wireless Door Open Contact Sensor Alarm Chime With 656 ft. Range, Remote Control With App
Home Depot
Free shipping
$381.16
Security Door Controls Infrared Motion Sensor: 2 in Ht, 7 in Wd Model: MD-31DB
Grainger
$381.16
Security Door Controls Infrared Motion Sensor: 2 in Ht, 7 in Wd Model: MD-31DB
Grainger
$101.31
$118.20
Traceable 07504-29 7600 Smart Door Sensor
Test Equipment Depot
14% off
$101.31
$118.20
Traceable 07504-29 7600 Smart Door Sensor
Test Equipment Depot
$26.99
MOBI Smart Wi-Fi Door & Window Sensor Real-Time Alerts, App Control, Easy Install - 2Pk
Target
Free shipping
$26.99
MOBI Smart Wi-Fi Door & Window Sensor Real-Time Alerts, App Control, Easy Install - 2Pk
Target
Free shipping
$25.49
Wifi Door Sensor, Alarm Contact Sensor, Easy Installation Home Security System-2 Count, White
Kohl's
$25.49
Wifi Door Sensor, Alarm Contact Sensor, Easy Installation Home Security System-2 Count, White
Kohl's
$435.89
Device Door Position Sensor 41-5666 For Thermo King
Fridayparts.com
$10 Off*
$435.89
Device Door Position Sensor 41-5666 For Thermo King
Fridayparts.com
$10 Off*
$21.99
Motion Sensor Door Chime For Business, Outdoor Doorbell Kit Wireless Driveway Alert: Infrared Motion Sensor Chime With 1 Plug-In Receiver And 1 PIR Mo
Walmart
$21.99
Motion Sensor Door Chime For Business, Outdoor Doorbell Kit Wireless Driveway Alert: Infrared Motion Sensor Chime With 1 Plug-In Receiver And 1 PIR Mo
Walmart
$55.08
Lascar Electronics WIRELESS ALERT DC SENSOR - DOOR SENSOR -
DigiKey
$55.08
Lascar Electronics WIRELESS ALERT DC SENSOR - DOOR SENSOR -
DigiKey
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    Shop Sensors For Opening Doors

    Sponsored
    About our ads
    $137.20
    $342.92
    Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
    SimpliSafe, Inc.
    Free shipping
    59% off
    $137.20
    $342.92
    Single Story Home Security System | Intrusion Protection With Motion And Entry Sensors | Official Simplisafe
    SimpliSafe, Inc.
    Free shipping
    $23.79
    $27.99
    Sanjie Wireless Door Chime Sensor, When Door Opens, Entry Alarm For Business/Home/Kids, 5 Adjustable Volume Ringer Alert 2 Sensors + 1 Receivers, 500
    Amazon.com
    266
    15% off
    $23.79
    $27.99
    Sanjie Wireless Door Chime Sensor, When Door Opens, Entry Alarm For Business/Home/Kids, 5 Adjustable Volume Ringer Alert 2 Sensors + 1 Receivers, 500
    Amazon.com
    266
    $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
    27K+
    Free shipping
    $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
    27K+
    $85.74
    Safety Technology International, Inc. STI-6402 105 Db Exit Stopper® Multifunction Door Alarm For Double Doors With On/Off Switch And 9 Volt Battery
    Amazon.com
    107
    Free shipping
    $85.74
    Safety Technology International, Inc. STI-6402 105 Db Exit Stopper® Multifunction Door Alarm For Double Doors With On/Off Switch And 9 Volt Battery
    Amazon.com
    107
    $16.99
    3In1 Alarm - Door Left Open Alarm, Doors Chime With Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alert, 80 To 120 Db, Close Door Reminder For
    Amazon.com
    352
    $16.99
    3In1 Alarm - Door Left Open Alarm, Doors Chime With Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alert, 80 To 120 Db, Close Door Reminder For
    Amazon.com
    352
    $59.99
    $71.79
    2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
    Amazon.com
    133
    Free shipping
    16% off
    $59.99
    $71.79
    2 Pack - Honeywell 5800MINI Door/Window Transmitter (REPLACES DISCONTINUED HONEYWELL 5811)
    Amazon.com
    133
    $10.99
    $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
    26K+
    45% off
    $10.99
    $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
    26K+
    $32.39
    $35.99
    Sanjie Door Chime, Door Open Contact Sensor Alarm For Business/Store/Home/Office When Entering, With 500 ft Range,26 Chimes 5 Adjustable Volume 2
    Amazon.com
    1K+
    10% off
    $32.39
    $35.99
    Sanjie Door Chime, Door Open Contact Sensor Alarm For Business/Store/Home/Office When Entering, With 500 ft Range,26 Chimes 5 Adjustable Volume 2
    Amazon.com
    1K+
    $47.10
    $56.00
    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
    15% off
    $47.10
    $56.00
    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
    $21.89
    Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
    Amazon.com
    129
    $21.89
    Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
    Amazon.com
    129
    $16.99
    41A5034 Safety Sensor Kit, Replacement For Craftsman/Chamberlain/Liftmaster Garage Door Sensor, Compatible With Liftmaster/Chamberlain/Craftsman
    Amazon.com
    736
    $16.99
    41A5034 Safety Sensor Kit, Replacement For Craftsman/Chamberlain/Liftmaster Garage Door Sensor, Compatible With Liftmaster/Chamberlain/Craftsman
    Amazon.com
    736
    $16.99
    GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
    Amazon.com
    18
    $16.99
    GAGALOR NO&NC 3 Wires Magnetic Garage Door Contacts Heavy Duty Alarm Switch Sensor For Roller Shutter With Adjustable Bracket
    Amazon.com
    18
    $21.98
    Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor With App Notification Alert, Contact Sensor For Home Security, Compatible
    Amazon.com
    9
    $21.98
    Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor With App Notification Alert, Contact Sensor For Home Security, Compatible
    Amazon.com
    9
    $19.99
    Wireless Motion Sensor Doorbell -Indoor Motion Detector Alarm, Door Chime For Business/Store/Office Entrance, Entry Alert Bell With Buzzer, USB/
    Amazon.com
    55
    $19.99
    Wireless Motion Sensor Doorbell -Indoor Motion Detector Alarm, Door Chime For Business/Store/Office Entrance, Entry Alert Bell With Buzzer, USB/
    Amazon.com
    55
    $20.39
    $23.99
    Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry Alert
    Amazon.com
    2K+
    15% off
    $20.39
    $23.99
    Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry Alert
    Amazon.com
    2K+
    $18.89
    Door Window Alarm, 90Db Door Alarms Sensor For Kids Safety, Home Security, Door Window Burglar Alarm, Window Pool Alarms For Home, Apartments, Offices
    Amazon.com
    54
    $18.89
    Door Window Alarm, 90Db Door Alarms Sensor For Kids Safety, Home Security, Door Window Burglar Alarm, Window Pool Alarms For Home, Apartments, Offices
    Amazon.com
    54
    $7.99
    Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
    Amazon.com
    222
    $7.99
    Security Door Window Alarm, 90DB Wireless Sensor Door Window Burglar Alarm, Door Alarms For Kids Safety, Easy Installation Doorbell Alarms For Office
    Amazon.com
    222
    $619.00
    FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
    Radwell.com
    $619.00
    FALCON BEA DOOR SENSORS & SECURITY - Sensors & Switches & Sensor Module/Housing Supplies
    Radwell.com