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sensor security

Best Buy customers often prefer the following products when searching for sensor security.

A security sensor is a device that is designed to detect the presence of an intruder and alert the homeowner. They are often used in conjunction with a video surveillance system. Browse the top-ranked list of security sensors below along with associated reviews and opinions.

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  1. eufy Security - Smart Home Security Entry Sensor Add-on - Front_Zoom
    Top comment

    "Great sensor for to improve the home security. I’d like support with HomeKit in the future, although the eufy app is great....Definitely recommend the Eufy Security system - Homebase, cameras and sensors....Good sensors"

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    Product Description

    Protect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. Once a window or door is ajar by 1.5 inch, an alert will be sent to your smartphone, and a 100-decibel siren will go off on the HomeBase (can be disabled). Requires eufy Security HomeBase.
    See all Door & Window Alarms
    Top comment

    "Great sensor for to improve the home security. I’d like support with HomeKit in the future, although the eufy app is great....Definitely recommend the Eufy Security system - Homebase, cameras and sensors....Good sensors"

    See all customer reviews

    Product Description

    Protect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. Once a window or door is ajar by 1.5 inch, an alert will be sent to your smartphone, and a 100-decibel siren will go off on the HomeBase (can be disabled). Requires eufy Security HomeBase.
    See all Door & Window Alarms
    Your price for this item is $19.99
    The previous price was $29.99
    See all Door & Window Alarms
  2. SimpliSafe - 4pack Entry Sensor - White - Front_Zoom
    Top comment

    "Sensor Review...Sensors work perfectly. Easy to setup and install....SimpliSafe Sensor...Easy Setup, system recognized new sensors immediately."

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    Product Description

    Easy to install on every type of door or window. The magnet goes on the door or window, and the sensor goes on the frame (or vice versa). Magnet can be placed up to 2 inches from the sensor, so sensors fit on all types of doors and windows. SimpliSafe sensors come with the battery pre-installed and adhesive tape pre-applied, making set-up a snap.
    See all Door & Window Alarms
    Top comment

    "Sensor Review...Sensors work perfectly. Easy to setup and install....SimpliSafe Sensor...Easy Setup, system recognized new sensors immediately."

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    Product Description

    Easy to install on every type of door or window. The magnet goes on the door or window, and the sensor goes on the frame (or vice versa). Magnet can be placed up to 2 inches from the sensor, so sensors fit on all types of doors and windows. SimpliSafe sensors come with the battery pre-installed and adhesive tape pre-applied, making set-up a snap.
    See all Door & Window Alarms
    Your price for this item is $49.99
    See all Door & Window Alarms
  3. Ring - Alarm Contact Sensor (2nd Gen) (2-Pack) - White - Front_Zoom
    Top comment

    "Replacement sensors....Replaced faulty sensor, new sensor works great. Easy installation....Great Alarm sensors...2nd gen sensor are so sleek, very simple installation."

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    Product Description

    Expand your Ring Alarm system to secure each door and window in your home, and get alerts as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you’ll always be the first to know when something’s ajar. *Requires Ring Alarm Security Kit (Gen 2).
    See all Door & Window Alarms
    Top comment

    "Replacement sensors....Replaced faulty sensor, new sensor works great. Easy installation....Great Alarm sensors...2nd gen sensor are so sleek, very simple installation."

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    Product Description

    Expand your Ring Alarm system to secure each door and window in your home, and get alerts as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you’ll always be the first to know when something’s ajar. *Requires Ring Alarm Security Kit (Gen 2).
    See all Door & Window Alarms
    Your price for this item is $39.99
    See all Door & Window Alarms
  4. Ring - Alarm Outdoor Contact Sensor - Gray - Front_Zoom

    Model: B0923BK77S
    SKU: 6481972
    Top comment

    "Outdoor sensor...Outdoors sensor"

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    Product Description

    Help secure outdoor gates, sheds, guesthouses, and windows with Ring Alarm Outdoor Contact Sensor. Get mobile alerts when your outdoor gate opens, or set the sensor to automatically trigger your Ring Alarm siren when armed in Home or Away mode. Outdoor Contact Sensor comes with mounting tape and screws for easy installation on most surfaces.
    See all Door & Window Alarms
    Top comment

    "Outdoor sensor...Outdoors sensor"

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    Product Description

    Help secure outdoor gates, sheds, guesthouses, and windows with Ring Alarm Outdoor Contact Sensor. Get mobile alerts when your outdoor gate opens, or set the sensor to automatically trigger your Ring Alarm siren when armed in Home or Away mode. Outdoor Contact Sensor comes with mounting tape and screws for easy installation on most surfaces.
    See all Door & Window Alarms
    Your price for this item is $49.99
    See all Door & Window Alarms
  5. Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White - Front_Zoom
    Top comment

    "Compact size sensor...I ordered more sensors for additional security of My house...Ring contact sensor...Ring contact sensors made new home security installation a snap."

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    Product Description

    Expand your Ring Alarm system to secure each door and window in your home, and get alerts as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you’ll always be the first to know when something’s ajar. *Requires Ring Alarm Security Kit (Gen 2).
    See all Door & Window Alarms
    Top comment

    "Compact size sensor...I ordered more sensors for additional security of My house...Ring contact sensor...Ring contact sensors made new home security installation a snap."

    See all customer reviews

    Product Description

    Expand your Ring Alarm system to secure each door and window in your home, and get alerts as soon as they open. Ring Alarm Contact Sensors mount to any door or window frame in your home for easy, DIY installation. Connect them to your Ring Alarm and receive mobile alerts from the Ring App so you’ll always be the first to know when something’s ajar. *Requires Ring Alarm Security Kit (Gen 2).
    See all Door & Window Alarms
    Your price for this item is $99.99
    See all Door & Window Alarms
  6. Ring - Alarm Security Kit 9-Piece (2nd Gen) - White - Front_Zoom
    Top comment

    "Great security system...I like how easy to install sensors and professional monitoring is only $10 compared to other DIY security systems. ...I added a few more door sensors. The motion sensor is for alarm only. It won't trigger turning on lights, etc."

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    Product Description

    Ring Alarm Security System packs the power of whole-home security into an easy DIY package. When armed, Ring Alarm sends notifications to your phone and tablet whenever doors or windows open and when motion is detected at home. Integrate it with Ring cams, doorbells, and select smart locks to control your entire security system right in the free Ring App. Activate 24/7 professional monitoring with a Ring Protect Plan and get emergency support when you need it.
    See all Home Security Systems
    Top comment

    "Great security system...I like how easy to install sensors and professional monitoring is only $10 compared to other DIY security systems. ...I added a few more door sensors. The motion sensor is for alarm only. It won't trigger turning on lights, etc."

    See all customer reviews

    Product Description

    Ring Alarm Security System packs the power of whole-home security into an easy DIY package. When armed, Ring Alarm sends notifications to your phone and tablet whenever doors or windows open and when motion is detected at home. Integrate it with Ring cams, doorbells, and select smart locks to control your entire security system right in the free Ring App. Activate 24/7 professional monitoring with a Ring Protect Plan and get emergency support when you need it.
    See all Home Security Systems
    Your price for this item is $299.99
    See all Home Security Systems
  7. Ring - Alarm Flood & Freeze Sensor (2-Pack) - Front_Zoom

    Model: 4SF2S9-0EN0
    SKU: 6328637
    Top comment

    "I got 2 of these water sensors but only one is working. The one that work was able to sensor water and alert the call center to call me....One more addition to the Ring Security eco system...These sensors are add-ons for Ring security system. Not stand alone sensors, need hub to communicate. "

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    Product Description

    Stay ahead of water damage and protect your home from severe and costly repairs. Simply connect the Alarm Flood and Freeze Sensor to your Ring Alarm Security Kit (sold separately). Then place the Sensor on the floor near sinks, bathtubs, showers, refrigerators, freezers, washing machines, dishwashers, water heaters, water coolers, toilets, basements and any other sources of potential leaks. You’ll get notifications when water is detected or when the temperature drops below 40°F.
    See all Water & Temperature Sensors
    Top comment

    "I got 2 of these water sensors but only one is working. The one that work was able to sensor water and alert the call center to call me....One more addition to the Ring Security eco system...These sensors are add-ons for Ring security system. Not stand alone sensors, need hub to communicate. "

    See all customer reviews

    Product Description

    Stay ahead of water damage and protect your home from severe and costly repairs. Simply connect the Alarm Flood and Freeze Sensor to your Ring Alarm Security Kit (sold separately). Then place the Sensor on the floor near sinks, bathtubs, showers, refrigerators, freezers, washing machines, dishwashers, water heaters, water coolers, toilets, basements and any other sources of potential leaks. You’ll get notifications when water is detected or when the temperature drops below 40°F.
    See all Water & Temperature Sensors
    Your price for this item is $69.99
    See all Water & Temperature Sensors
  8. ADT - Motion Detectors for Home Security - Front_Zoom

    Model: SSM1R0-29
    SKU: 6440282
    Top comment

    "Purchased a system direct from Blue by ADT and needed an extra motion sensor. I was glad to find it at Best Buy locally. "

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    Product Description

    Use the ADT pet-friendly motion detectors to secure rooms with several windows or a hallway with none. (The ADT wireless motion detectors can only be paired with the ADT DIY home security system). It’s easy to set up wireless motion sensors. No tools are required. You can monitor any detected movement from the free mobile app. If you opt for 24/7 professional monitoring from ADT, the motion detectors will automatically notify our service of a potential intruder.
    See all Motion Sensors & Detectors
    Top comment

    "Purchased a system direct from Blue by ADT and needed an extra motion sensor. I was glad to find it at Best Buy locally. "

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    Product Description

    Use the ADT pet-friendly motion detectors to secure rooms with several windows or a hallway with none. (The ADT wireless motion detectors can only be paired with the ADT DIY home security system). It’s easy to set up wireless motion sensors. No tools are required. You can monitor any detected movement from the free mobile app. If you opt for 24/7 professional monitoring from ADT, the motion detectors will automatically notify our service of a potential intruder.
    See all Motion Sensors & Detectors
    Your price for this item is $24.99
    See all Motion Sensors & Detectors
  9. ADT - Blue by 4pk Door and Window Sensor for Home Security - WHITE - Front_Zoom
    Top comment

    "Sensors...Wanted to add on a few sensors. However had to call up & get them installed...Great additional sensors...Some of our sensors that came with our original starter kit needed replacements. "

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    Product Description

    Get protection for all of your home's entryways with the Blue by ADT battery-operated sensors. These wireless sensors are easy to set-up in any window or doorway using the included self-adhering tape. Once set up is complete, the door and window sensors send a notification to your free mobile app when triggered. The wireless motion detectors can only be paired with the ADT DIY home security system. Requires Blue by ADT Smart Home Hub and free app.
    See all Door & Window Alarms
    Top comment

    "Sensors...Wanted to add on a few sensors. However had to call up & get them installed...Great additional sensors...Some of our sensors that came with our original starter kit needed replacements. "

    See all customer reviews

    Product Description

    Get protection for all of your home's entryways with the Blue by ADT battery-operated sensors. These wireless sensors are easy to set-up in any window or doorway using the included self-adhering tape. Once set up is complete, the door and window sensors send a notification to your free mobile app when triggered. The wireless motion detectors can only be paired with the ADT DIY home security system. Requires Blue by ADT Smart Home Hub and free app.
    See all Door & Window Alarms
    Your price for this item is $54.99
    See all Door & Window Alarms
  10. Airthings - View Radon Battery Wi-Fi Smart Radon/Humidity/Temperature Sensor - Matte White - Front_Zoom
    Top comment

    "Airthings offers this Radon sensor in a package with a few other sensors that are interesting but certainly not urgent. ...You have to download the airthings app and remove the plastic tab for the battery to power the sensor. I got this for the radon detection sensor first and the airquality sensor second. "

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    Product Description

    It's time to get SMART about Radon. View Radon is our most advanced smart radon monitor with the newest technology in digital radon detection. Radon is a dangerous gas that is found in every home, and is the leading cause of lung cancer among non-smokers. View Radon is a Wi-Fi -connected, battery-operated monitor with a built-in display, including our latest radon detection technology. Wave in front of the device for the current values of radon, humidity, and temperature. Per the EPA, "Every home needs a radon detector"—understand your long-term exposure with continuous monitoring. View series products are: battery operated or use USB plug; wireless and Wi-Fi -connected; work as a hub; include a customizable display; connected to an app (iOS/Android) and online dashboard with full data and reporting. Gain peace of mind. Use View Radon as a hub to connect up to 10 Airthings devices for a multi-room monitoring system.
    See all Home Alarms & Sensors
    Top comment

    "Airthings offers this Radon sensor in a package with a few other sensors that are interesting but certainly not urgent. ...You have to download the airthings app and remove the plastic tab for the battery to power the sensor. I got this for the radon detection sensor first and the airquality sensor second. "

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    Product Description

    It's time to get SMART about Radon. View Radon is our most advanced smart radon monitor with the newest technology in digital radon detection. Radon is a dangerous gas that is found in every home, and is the leading cause of lung cancer among non-smokers. View Radon is a Wi-Fi -connected, battery-operated monitor with a built-in display, including our latest radon detection technology. Wave in front of the device for the current values of radon, humidity, and temperature. Per the EPA, "Every home needs a radon detector"—understand your long-term exposure with continuous monitoring. View series products are: battery operated or use USB plug; wireless and Wi-Fi -connected; work as a hub; include a customizable display; connected to an app (iOS/Android) and online dashboard with full data and reporting. Gain peace of mind. Use View Radon as a hub to connect up to 10 Airthings devices for a multi-room monitoring system.
    See all Home Alarms & Sensors
    Your price for this item is $199.99
    See all Home Alarms & Sensors
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