Skip to contentGo to Product Search
Main Content
Skip to contentGo to Product Search
Main Content
Categories & Filters
Best Buy

/

home security & monitoring

/

home alarms & sensors

/

water & temperature sensors

Replacement Sensors

A security sensor is a device that monitors an area for the presence of threats or intruders and triggers an alarm or other response when it detects such a presence. They are often used in conjunction with a video surveillance system or other security equipment. Browse the top-ranked list of replacement sensors below along with associated reviews and opinions. 

Read More
Results
Main Results

  1. ecobee - SmartSensor 2-Pack - White

    SKU: JXC53VLLKK

    Good sensors...Great sensor for keeping track on temps in rooms. Did have one fail but manufacturer support was great and quick to send replacement....Ecobee sensor...Outstanding sensors and easy to set...

    Product Description

    A pair of white, battery-powered sensors that detect room occupancy and enable smart temperature control via app.
    See all Water & Temperature Sensors
    Your price for this item is $99.99

  2. Google - Nest Temperature Sensor (2nd gen) 1-pack - Porcelain

    SKU: JJ8T5CCSFX

    Easy to connect but seems to be variable on how well it controls the temp if set to only one sensor with multiple sensors in the house...Nest Temp Sensor...Best temperature sensor. Gives accurate temperature...

    Product Description

    A battery-powered porcelain temperature sensor that wirelessly manages room comfort via app and Bluetooth connectivity.
    See all Water & Temperature Sensors
    Your price for this item is $39.99

  3. Google - Nest Temperature Sensor (2nd gen) 3-pack - Porcelain

    SKU: JJ8T5CCSV2

    Product Description

    A porcelain, battery-powered sensor 3-pack that wirelessly monitors and manages room temperature via app.
    See all Water & Temperature Sensors
    Your price for this item is $99.99

  4. Arlo - All-in-One Sensor with 8 sensing functions for Home Security System, 1 Pack - White

    SKU: JJ8QV84XTS

    These sensors are the bees knees. They have more than one function packed into the sensor. ...Arlo Sensors...sensor

    Product Description

    An all-in-one white sensor offering eight detection functions and easy app control for enhanced home security.
    See all Water & Temperature Sensors
    Your price for this item is $29.99

  5. Lockly - Secure Plus Smart Lock Bluetooth Replacement Latch with Touchscreen/Fingerprint Sensor/Key Access/Auto Lock - Satin Nickel

    SKU: J3R8QYVGC9

    Product Description

    A satin nickel smart lock featuring fingerprint sensor, LED touchscreen, Bluetooth app control, and auto-lock functionality.
    See all Smart Door Locks
    Your price for this item is $219.99

  6. Lockly - Secure Plus Smart Lock Bluetooth Replacement Latch with Touchscreen/Fingerprint Sensor/Key Access/Auto Lock - Venetian Bronze

    SKU: J3R8QYVG2X

    Product Description

    A venetian bronze smart lock featuring Bluetooth, fingerprint sensor, touchscreen, key access, and auto-lock functionality.
    See all Smart Door Locks
    Your price for this item is $219.99

  7. Copeland - Sensi Smart Temperature and Humidity Sensor - White

    SKU: J325YXJ89X

    Product Description

    A white, battery-powered sensor that wirelessly monitors temperature and humidity for enhanced smart thermostat control.
    See all Water & Temperature Sensors
    Your price for this item is $56.97

  8. Wireless Cooking Sensor for Thermador Masterpiece Series Cooktops - Black

    SKU: J3P322PW6Y

    Product Description

    A wireless black sensor that ensures precise temperature control when paired with compatible induction cooktops.
    See all Range & Oven Accessories
    Your price for this item is $199.00

  9. SimpliSafe - Motion Sensor - White

    SKU: J362VFS82G

    Motion Sensor...I am thinking about adding a glass breakage sensor and two additional water sensors for underneath my kitchen and bathroom sink so i am truly covered....I ourchased this sensor becausenit...

    Product Description

    A white, battery-powered motion sensor with pet detection, 90º field of view, and app compatibility.
    See all Door & Window Alarms
    Your price for this item is $30.99
    Save $4
    The previous price was $34.99

  10. Lockly - Secure Plus Smart Lock Bluetooth Replacement Latch with Touchscreen/Fingerprint Sensor/Key Access/Auto Lock - Matte Black

    SKU: J3R8QYVGXH

    Product Description

    A matte black smart lock offering fingerprint, touchscreen, key, and Bluetooth app access with auto-lock features.
    See all Smart Door Locks
    Your price for this item is $219.99
1-18 of 176 items
0 items

Best Sellers

Related Pages

FAQ

Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada

In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.