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Best Buy customers often prefer the following products when searching for simple sensors.

If you're looking for a way to monitor your home's temperature, humidity, or motion, you might consider adding a sensor to your home. These devices can be used to track these factors and more. Browse the top-ranked list of simple sensors below along with associated reviews and opinions.

Main Results
  1. Honeywell Home - Smart Room Sensor - White - Front_Zoom

    Model: RCHTSENSOR-1PK
    SKU: 6332968
    Top comment

    "Works great with the other sensors for my t9 thermostat. Still working perfect....The thermostat averages the readings from all selected sensors."

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    Product Description

    Optimize overall comfort in any room with this Honeywell Home smart room sensor. User-friendly controls let you define ideal comfort settings depending on time and weather conditions, while the 200-foot sensor range ensures effective monitoring of almost every part of the room. This Honeywell Home smart room sensor features a simple design for quick installation.
    See all Motion Sensors & Detectors
    Top comment

    "Works great with the other sensors for my t9 thermostat. Still working perfect....The thermostat averages the readings from all selected sensors."

    See all customer reviews

    Product Description

    Optimize overall comfort in any room with this Honeywell Home smart room sensor. User-friendly controls let you define ideal comfort settings depending on time and weather conditions, while the 200-foot sensor range ensures effective monitoring of almost every part of the room. This Honeywell Home smart room sensor features a simple design for quick installation.
    See all Motion Sensors & Detectors
    See all Motion Sensors & Detectors
  2. Sengled - Smart Window & Door Sensor (2-Pack) - White - Front_Zoom
    Top comment

    "Sengled Smart Doo sensors...Would buy the zwave contact sensor instead of this since I have zwave extender devices....Simple and easy to use. Fully integrates with HomeKit."

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    Product Description

    Improve home security with this two-pack of Sengled smart window and door sensors. Featuring simple designs and adhesive backs, these smart sensors are easy to install, set up and pair to compatible hubs. These Sengled smart window and door sensors let you check in at home remotely via the included app.
    See all Door & Window Alarms
    Top comment

    "Sengled Smart Doo sensors...Would buy the zwave contact sensor instead of this since I have zwave extender devices....Simple and easy to use. Fully integrates with HomeKit."

    See all customer reviews

    Product Description

    Improve home security with this two-pack of Sengled smart window and door sensors. Featuring simple designs and adhesive backs, these smart sensors are easy to install, set up and pair to compatible hubs. These Sengled smart window and door sensors let you check in at home remotely via the included app.
    See all Door & Window Alarms
    See all Door & Window Alarms
  3. Aqara - FP2 Presence Sensor- mmWave Radar Sensor, Zone Positioning, Multi-Person and Fall Detection, Sleep Monitoring - White - Front_Zoom
    Top comment

    "Aqara FP2 Presence Sensor...The initial pairing process is very simple: you plug the sensor into the USB power supply using the included USB cable and activate pairing mode. ...A powerful room sensor that does a lot...This is not a simple plug it in and it works device. Aqara is constantly adding new features to this sensor like Sleep Monitoring Mode, People Counting and more to come. "

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    Product Description

    Aqara Presence Sensor FP2 uses cutting-edge millimeter-wave radar technology, which can accurately detect the presence of people even with slight movements. This technology ensures continuity and stability of the smart device. It also has the function of zone positioning, which allows for the automation of different conditions in different zones, such as beds and tables. One space can now be divided into up to 30 small zones and recognize up to five targets (Multi-person Detection). It can also control other smart home devices through ecosystems such as Apple Home to achieve wider applications. It features functions such as human fall recognition, sleep monitoring and a built-in light sensor. Likewise, it is a great helper that can truly combine the diversity of the user's home life and realize the automation of different personalities.
    See all Motion Sensors & Detectors
    Top comment

    "Aqara FP2 Presence Sensor...The initial pairing process is very simple: you plug the sensor into the USB power supply using the included USB cable and activate pairing mode. ...A powerful room sensor that does a lot...This is not a simple plug it in and it works device. Aqara is constantly adding new features to this sensor like Sleep Monitoring Mode, People Counting and more to come. "

    See all customer reviews

    Product Description

    Aqara Presence Sensor FP2 uses cutting-edge millimeter-wave radar technology, which can accurately detect the presence of people even with slight movements. This technology ensures continuity and stability of the smart device. It also has the function of zone positioning, which allows for the automation of different conditions in different zones, such as beds and tables. One space can now be divided into up to 30 small zones and recognize up to five targets (Multi-person Detection). It can also control other smart home devices through ecosystems such as Apple Home to achieve wider applications. It features functions such as human fall recognition, sleep monitoring and a built-in light sensor. Likewise, it is a great helper that can truly combine the diversity of the user's home life and realize the automation of different personalities.
    See all Motion Sensors & Detectors
    See all Motion Sensors & Detectors
  4. SimpliSafe - Temperature  Sensor - White - Front_Zoom

    Model: SS3-BBY-TEMP
    SKU: 6323163
    Top comment

    "Seamless and simple...Freeze sensor worked as expected...We got a call from our alarm monitoring company that the house temperature was at 41 degrees. Without the sensor, we may not have known for days."

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    Product Description

    Protect your home from burst pipes with this SimpliSafe Temperature Sensor. It sounds an alarm if the temperature drops below 41 degrees F, and with a monitoring plan, you can receive a phone call, text or email notification of a potential freeze. Place this SimpliSafe Temperature sensor in any climate-controlled room to protect fine art and other temperature-sensitive items.
    See all Water & Temperature Sensors
    Top comment

    "Seamless and simple...Freeze sensor worked as expected...We got a call from our alarm monitoring company that the house temperature was at 41 degrees. Without the sensor, we may not have known for days."

    See all customer reviews

    Product Description

    Protect your home from burst pipes with this SimpliSafe Temperature Sensor. It sounds an alarm if the temperature drops below 41 degrees F, and with a monitoring plan, you can receive a phone call, text or email notification of a potential freeze. Place this SimpliSafe Temperature sensor in any climate-controlled room to protect fine art and other temperature-sensitive items.
    See all Water & Temperature Sensors
    See all Water & Temperature Sensors
  5. Ring - Wi-Fi Smart Mailbox Sensor - Black - Front_Zoom

    Model: B08FBK3YVX
    SKU: 6448572
    Top comment

    "Just a Motion Sensor...It’s a motion sensor. Plain and simple. It does what it is supposed to do....Sensor"

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    Product Description

    Know when mail arrives or someone opens your mailbox. When Mailbox Sensor detects motion, you’ll get a real-time alert in the Ring App or via connected Alexa-enabled devices. It can also tell your Ring Smart Lighting, Cameras, and Doorbells to turn on—helping to light up your yard and record what’s happening (subscription required, sold separately)1
    See all Motion Sensors & Detectors
    Top comment

    "Just a Motion Sensor...It’s a motion sensor. Plain and simple. It does what it is supposed to do....Sensor"

    See all customer reviews

    Product Description

    Know when mail arrives or someone opens your mailbox. When Mailbox Sensor detects motion, you’ll get a real-time alert in the Ring App or via connected Alexa-enabled devices. It can also tell your Ring Smart Lighting, Cameras, and Doorbells to turn on—helping to light up your yard and record what’s happening (subscription required, sold separately)1
    See all Motion Sensors & Detectors
    See all Motion Sensors & Detectors
  6. T1 Temperature and Humidity Sensor- Requires Aqara Hub, Supports Apple HomeKit, Alexa, Google, SmartThings - White - Front_Zoom
    Top comment

    "Small simple sensor that provides accurate readings!...[This review was collected as part of a promotion.] This sensor was simple and easy to install and connect to my home WiFi. ...Without their other smart plugs and sensors, it’s just a temperature gauge. I’ve had such a hard time getting my phone to even connect to the device and for my app to recognize the device I have is a temperature sensor."

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    Product Description

    Aqara Temperature and Humidity Sensor T1 monitors and records indoor temperature, humidity and atmospheric pressure in real time. The current and historical data is displayed in the app. It can also trigger other smart accessories to automate your home.
    See all Water & Temperature Sensors
    Top comment

    "Small simple sensor that provides accurate readings!...[This review was collected as part of a promotion.] This sensor was simple and easy to install and connect to my home WiFi. ...Without their other smart plugs and sensors, it’s just a temperature gauge. I’ve had such a hard time getting my phone to even connect to the device and for my app to recognize the device I have is a temperature sensor."

    See all customer reviews

    Product Description

    Aqara Temperature and Humidity Sensor T1 monitors and records indoor temperature, humidity and atmospheric pressure in real time. The current and historical data is displayed in the app. It can also trigger other smart accessories to automate your home.
    See all Water & Temperature Sensors
    See all Water & Temperature Sensors
  7. Aqara - P2 Door and Window Sensor- Matter Natively Support, Need Matter Border Router, Remote Alarm and Local Automation - White - Front_Zoom
    Top comment

    "I connected this to my Apple TV. It was simple and easy to do. I attached this sensor to my back door. ...Great Matter Door/Window Sensor if you have a Thread border router...Basically, If you have Matter over Thread working in your home, and you need a door/window sensor to give you real time info, this sensor works perfectly and feedback is pretty much instant. "

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    Product Description

    Aqara Door and Window Sensor P2 not only incorporates all the advanced automation and security features Aqara is known for, but also gives users the option to connect it directly to third-party Thread border routers, such as smart speakers, and use all the benefits of the Matter smart home standard.
    See all Door & Window Alarms
    Top comment

    "I connected this to my Apple TV. It was simple and easy to do. I attached this sensor to my back door. ...Great Matter Door/Window Sensor if you have a Thread border router...Basically, If you have Matter over Thread working in your home, and you need a door/window sensor to give you real time info, this sensor works perfectly and feedback is pretty much instant. "

    See all customer reviews

    Product Description

    Aqara Door and Window Sensor P2 not only incorporates all the advanced automation and security features Aqara is known for, but also gives users the option to connect it directly to third-party Thread border routers, such as smart speakers, and use all the benefits of the Matter smart home standard.
    See all Door & Window Alarms
    See all Door & Window Alarms
  8. Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White - Front_Zoom
    Top comment

    "Simple, Easy to install...Simple and easy to install. Barcode makes things easy. ...Extra contact sensor...Works great and setup instructions are simple and easy to follow."

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    Product Description

    Expand your Ring Alarm system to secure each door and window in your home, and hear chirps 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. Ring Protect subscription required, sold separately.*
    See all Door & Window Alarms
    Top comment

    "Simple, Easy to install...Simple and easy to install. Barcode makes things easy. ...Extra contact sensor...Works great and setup instructions are simple and easy to follow."

    See all customer reviews

    Product Description

    Expand your Ring Alarm system to secure each door and window in your home, and hear chirps 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. Ring Protect subscription required, sold separately.*
    See all Door & Window Alarms
    See all Door & Window Alarms
  9. T1 Water Leak Sensor- Requires Aqara Hub, Supports Apple HomeKit, Alexa, Google, SmartThings - White - Front_Zoom
    Top comment

    "Simple set up, provides peace of mind...Our water heater occasionally leaks a bit in the basement, and this water sensor has been set up to detect when that happens. ...The setup was simple and straightforward, and sensor was incredibly reliable in detecting water leaks. "

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    Product Description

    Aqara Water Leak Sensor T1 detects water leak or flooding events and monitors the status of water leak. When the water leak or flooding occurs, it can send an instant alert notification via app. It also works with other smart accessories to automate your home.
    See all Water & Temperature Sensors
    Top comment

    "Simple set up, provides peace of mind...Our water heater occasionally leaks a bit in the basement, and this water sensor has been set up to detect when that happens. ...The setup was simple and straightforward, and sensor was incredibly reliable in detecting water leaks. "

    See all customer reviews

    Product Description

    Aqara Water Leak Sensor T1 detects water leak or flooding events and monitors the status of water leak. When the water leak or flooding occurs, it can send an instant alert notification via app. It also works with other smart accessories to automate your home.
    See all Water & Temperature Sensors
    See all Water & Temperature Sensors
  10. Ring - Alarm Glass Break Sensor - White - Front_Zoom

    Model: B08TG6NCTS
    SKU: 6492193
    Top comment

    "Good sensor...Pros: Simple installation. The app is super easy to navigate the motion detection is spot on. "

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    Product Description

    Monitor glass windows and doors for break-in attempts with Ring Alarm Glass Break Sensor. Using AI technology, the sensor detects the sound of glass breaking up to 25 feet. You’ll receive notifications whenever breaking glass is detected, or receive a call from our monitoring center if you have enrolled in professional monitoring* with a Ring Protect Pro subscription, sold separately.** Requires Ring Alarm or Ring Alarm Pro, both sold separately.
    See all Door & Window Alarms
    Top comment

    "Good sensor...Pros: Simple installation. The app is super easy to navigate the motion detection is spot on. "

    See all customer reviews

    Product Description

    Monitor glass windows and doors for break-in attempts with Ring Alarm Glass Break Sensor. Using AI technology, the sensor detects the sound of glass breaking up to 25 feet. You’ll receive notifications whenever breaking glass is detected, or receive a call from our monitoring center if you have enrolled in professional monitoring* with a Ring Protect Pro subscription, sold separately.** Requires Ring Alarm or Ring Alarm Pro, both sold separately.
    See all Door & Window Alarms
    See all Door & Window Alarms
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