Replacement Sensors
Best Buy customers often prefer the following products when searching for 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.
SimpliSafe - Motion Sensor - White
Model: CA001-01RUSSKU: 6543525Top comment"I ourchased this sensor becausenit is the updated version. I dont know of its just this sensor, but it has a issue where on ocassion it will go offline, then after a couple hours it will come back online. ...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."
See all customer reviewsSee all Door & Window AlarmsProduct Description
Detect intruders with SimpliSafe’s high-performance motion sensor. Engineered to tell the difference between people and pets, so if the alarm goes off, you can be confident it’s real. With a 90º field of view and 35 ft. range, it protects an entire room from a single location. Plus, you get fast alerts sent right to your phone when motion is detected so you always know what’s happening at home. And if you have a 24/7 professional monitoring plan—our agents are always ready to send help to your home when an alarm is triggered.See all Door & Window AlarmsTop comment"I ourchased this sensor becausenit is the updated version. I dont know of its just this sensor, but it has a issue where on ocassion it will go offline, then after a couple hours it will come back online. ...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."
See all customer reviewsSee all Door & Window AlarmsProduct Description
Detect intruders with SimpliSafe’s high-performance motion sensor. Engineered to tell the difference between people and pets, so if the alarm goes off, you can be confident it’s real. With a 90º field of view and 35 ft. range, it protects an entire room from a single location. Plus, you get fast alerts sent right to your phone when motion is detected so you always know what’s happening at home. And if you have a 24/7 professional monitoring plan—our agents are always ready to send help to your home when an alarm is triggered.
Ring - Alarm Contact Sensor (2nd Gen) (1-Pack) - White
Model: 4SD1SZ-0EN0SKU: 6403955Top comment"Ring sensor getting the job done...I like the smaller design of the new sensors...Functional replacement for first gen sensors...Old ring contact sensor stopped functioning. Ordered this to replace it. "
See all customer reviewsSee all Door & Window AlarmsProduct 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.See all Door & Window AlarmsTop comment"Ring sensor getting the job done...I like the smaller design of the new sensors...Functional replacement for first gen sensors...Old ring contact sensor stopped functioning. Ordered this to replace it. "
See all customer reviewsSee all Door & Window AlarmsProduct 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.
Traeger Grills - Pellet Sensor - Black
Model: BAC523SKU: 6448303Top comment"Pellet Sensor...The pellet sensor did exactly what it was supposed to do. We are very happy with this purchase....Sensor replacement...The sensor is easy to change put if there is a problem with it. "
See all customer reviewsSee all Grill PartsProduct Description
Compatible with D2WiFIRE®-enabled grills, the Traeger Pellet Sensor keeps an eye on yoursupply, ensuring you never run out of pellets again. This smart device lets you monitor yourpellet levels anytime, anywhere, and even sends you automated alerts when you’re runninglow, all through the Traeger App.Top comment"Pellet Sensor...The pellet sensor did exactly what it was supposed to do. We are very happy with this purchase....Sensor replacement...The sensor is easy to change put if there is a problem with it. "
See all customer reviewsSee all Grill PartsProduct Description
Compatible with D2WiFIRE®-enabled grills, the Traeger Pellet Sensor keeps an eye on yoursupply, ensuring you never run out of pellets again. This smart device lets you monitor yourpellet levels anytime, anywhere, and even sends you automated alerts when you’re runninglow, all through the Traeger App.See all Grill PartsYour price for this item is $39.99The comparable value price is $89.99Select pickup
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SimpliSafe - Glassbreak Sensor - White
Model: SS3-BBY-GBREAKSKU: 6323161Top comment"Glassbreak Sensors...The Glassbreak Sensors were easy to integrate into the SimpliSafe system and was easy to place in my home....One sensor versus three...This sensor can save you some money when it comes to multiple windows instead of buying individual sensors for each window."
See all customer reviewsSee all Door & Window AlarmsProduct Description
Act fast against burglaries with this SimpliSafe glass break sensor. It triggers an alarm if it detects the sound of shattering glass within its 20-foot range, providing reliable security even when no motion detector is used. This SimpliSafe glass break sensor utilizes detection algorithm and digital signal processing technologies for accurate sound recognition.See all Door & Window AlarmsTop comment"Glassbreak Sensors...The Glassbreak Sensors were easy to integrate into the SimpliSafe system and was easy to place in my home....One sensor versus three...This sensor can save you some money when it comes to multiple windows instead of buying individual sensors for each window."
See all customer reviewsSee all Door & Window AlarmsProduct Description
Act fast against burglaries with this SimpliSafe glass break sensor. It triggers an alarm if it detects the sound of shattering glass within its 20-foot range, providing reliable security even when no motion detector is used. This SimpliSafe glass break sensor utilizes detection algorithm and digital signal processing technologies for accurate sound recognition.
SimpliSafe - 4pack Entry Sensor - White
Model: ENS304SKU: 6432008Top comment"Sensor Review...Sensors work perfectly. Easy to setup and install....Entry sensor...Just what I needed for a replacement. Fit right in with system."
See all customer reviewsSee all Motion Sensors & DetectorsProduct 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 Motion Sensors & DetectorsTop comment"Sensor Review...Sensors work perfectly. Easy to setup and install....Entry sensor...Just what I needed for a replacement. Fit right in with system."
See all customer reviewsSee all Motion Sensors & DetectorsProduct 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.
Ring - Alarm Contact Sensor (2nd Gen) (6-Pack) - White
Model: 4SD6SZ-0EN0SKU: 6403961Top comment"Ring contact sensor...Ring contact sensors made new home security installation a snap....Extra sensor...Needed extra sensors they worked as they should. Great product"
See all customer reviewsSee all Door & Window AlarmsProduct 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.See all Door & Window AlarmsTop comment"Ring contact sensor...Ring contact sensors made new home security installation a snap....Extra sensor...Needed extra sensors they worked as they should. Great product"
See all customer reviewsSee all Door & Window AlarmsProduct 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 - Alarm Contact Sensor (2nd Gen) (2-Pack) - White
Model: 4SD2SZ-0EN0SKU: 6403968Top comment"Replacement door sensor...The new sensors are much better because of the size. They fit much better and are less noticeable....Replacement sensors....Replaced faulty sensor, new sensor works great. Easy installation."
See all customer reviewsSee all Door & Window AlarmsProduct 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.See all Door & Window AlarmsTop comment"Replacement door sensor...The new sensors are much better because of the size. They fit much better and are less noticeable....Replacement sensors....Replaced faulty sensor, new sensor works great. Easy installation."
See all customer reviewsSee all Door & Window AlarmsProduct 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.
SimpliSafe - 1pack Entry Sensor - White
Model: SS3-ENTRYSKU: 6298671Top comment"great replacements!...We changed some doors and frames during a remodel and the contractor lost the sensors to two doors. These replacements were easy to install and were recognized by the SimpliSafe control center. ...One of my entry sensors broke, and this OEM replacement was perfect."
See all customer reviewsSee all Motion Sensors & DetectorsProduct Description
Protect all the doors and windows in your home from break-ins with the SimpliSafe entry sensor. Working in tandem with your existing SimpliSafe protection package, this compact and discreet entry sensor goes unnoticed. Installation is a snap: simply place this SimpliSafe entry sensor on any window or door frame, and tap Add Device on your keypad.See all Motion Sensors & DetectorsTop comment"great replacements!...We changed some doors and frames during a remodel and the contractor lost the sensors to two doors. These replacements were easy to install and were recognized by the SimpliSafe control center. ...One of my entry sensors broke, and this OEM replacement was perfect."
See all customer reviewsSee all Motion Sensors & DetectorsProduct Description
Protect all the doors and windows in your home from break-ins with the SimpliSafe entry sensor. Working in tandem with your existing SimpliSafe protection package, this compact and discreet entry sensor goes unnoticed. Installation is a snap: simply place this SimpliSafe entry sensor on any window or door frame, and tap Add Device on your keypad.
Aqara - FP2 Presence Sensor- mmWave Radar Sensor, Zone Positioning, Multi-Person and Fall Detection, Sleep Monitoring - White
Model: PS-S02DSKU: 6568833Top comment"Best presence sensor in the market....This sensor is crazy good. Blew my mind as to how it works....Easy Setup Sensor...The Aqara FP2 Presence Sensor is a standout device in the world of smart home automation. "
See all customer reviewsSee all Water & Temperature SensorsProduct 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.Top comment"Best presence sensor in the market....This sensor is crazy good. Blew my mind as to how it works....Easy Setup Sensor...The Aqara FP2 Presence Sensor is a standout device in the world of smart home automation. "
See all customer reviewsSee all Water & Temperature SensorsProduct 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 Water & Temperature SensorsYour price for this item is $83.99Sold Out
ecobee - SmartSensor 2-Pack - White
Model: EB-RSHM2PK-01SKU: 6339178Top comment"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....I've had an Ecobee3 with the original smart sensors for about 3 years. Occasionally I would get a sensor disconnected message from some of my bedrooms and the T-stat would tell me to move the sensor closer which would've been impractical. "
See all customer reviewsSee all Water & Temperature SensorsProduct Description
SmartSensor provides comfort to you and your family in the rooms that matter most while saving you energy and money. Through infrared technology, SmartSensor detects when a room is occupied and communicates that information wirelessly to your smart thermostat from up to a range of 60 feet prompting automatic temperature adjustments for comfort.See all Water & Temperature SensorsTop comment"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....I've had an Ecobee3 with the original smart sensors for about 3 years. Occasionally I would get a sensor disconnected message from some of my bedrooms and the T-stat would tell me to move the sensor closer which would've been impractical. "
See all customer reviewsSee all Water & Temperature SensorsProduct Description
SmartSensor provides comfort to you and your family in the rooms that matter most while saving you energy and money. Through infrared technology, SmartSensor detects when a room is occupied and communicates that information wirelessly to your smart thermostat from up to a range of 60 feet prompting automatic temperature adjustments for comfort.
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