Surveillance EquipmentAll CamerasAll Home AssistantsAll PhonesAll Security CamerasApple HomeKit Compatible DevicesArloCell Phone AccessoriesComputer AccessoriesComputer MonitorsDesktop ComputersGeneral Electronic AccessoriesGoogleGoogle HomeGrades 6-12 ElectronicsHeadphonesHome Audio, Speakers & SoundbarsiPad & TabletsLaptop AccessoriesLaptopsNetworkingPC GamingPortable AudioResold Garden & ToolsRestored AutomotiveRestored HomeRestored PremiumRestored TechRestored ToolsSamsung SmartThings Compatible DevicesSecurity CamerasSecurity Cameras and Security Camera SystemsShop all Headphones & SpeakersShop by BenefitShop by BrandShop by CompatibilityShop by RoomShop Cameras by TypeSmart Energy and LightingSmart Home Assistants, Controllers & HubsSmart SpeakersSurveillance CamerasTablet AccessoriesTV AccessoriesWorks with AlexaWorks with Google Assistant
Sort by|
Surveillance EquipmentAll CamerasAll Home AssistantsAll PhonesAll Security CamerasApple HomeKit Compatible DevicesArloCell Phone AccessoriesComputer AccessoriesComputer MonitorsDesktop ComputersGeneral Electronic AccessoriesGoogleGoogle HomeGrades 6-12 ElectronicsHeadphonesHome Audio, Speakers & SoundbarsiPad & TabletsLaptop AccessoriesLaptopsNetworkingPC GamingPortable AudioResold Garden & ToolsRestored AutomotiveRestored HomeRestored PremiumRestored TechRestored ToolsSamsung SmartThings Compatible DevicesSecurity CamerasSecurity Cameras and Security Camera SystemsShop all Headphones & SpeakersShop by BenefitShop by BrandShop by CompatibilityShop by RoomShop Cameras by TypeSmart Energy and LightingSmart Home Assistants, Controllers & HubsSmart SpeakersSurveillance CamerasTablet AccessoriesTV AccessoriesWorks with AlexaWorks with Google Assistant
Smart Home Sensor(427)
Uses item details. Price when purchased online
Vivnt Recessed Door Contact Sensor VS-DW2100-345 $19.95
Sponsored
$1995
current price $19.95Vivnt Recessed Door Contact Sensor VS-DW2100-345
Save with
Room Alert 12S Proactive Environment Monitor – Built-in Temperature Sensor, Supports SSL/TLS, SNMP v3, App Alerts, Made in USA $779.00
Sponsored
$77900
current price $779.00Room Alert 12S Proactive Environment Monitor – Built-in Temperature Sensor, Supports SSL/TLS, SNMP v3, App Alerts, Made in USA
(2 pack) Universal Security Instruments, Sensing Plus, Hardwired Smoke & Fire Alarm, Multi-Criteria Detection, with 10 Year Battery Backup $69.88 $34.94/ea
Sponsored
$6988
current price $69.88$34.94/ea
From $34.94
(2 pack) Universal Security Instruments, Sensing Plus, Hardwired Smoke & Fire Alarm, Multi-Criteria Detection, with 10 Year Battery Backup
1224.2 out of 5 Stars. 122 reviews
Save with
Hosmart Wireless Driveway Alarm 1/2 Mile Range Outdoor Motion Sensor Household Sensors & Alarm From $34.99
Sponsored
From$3499
Hosmart Wireless Driveway Alarm 1/2 Mile Range Outdoor Motion Sensor Household Sensors & Alarm
914.5 out of 5 Stars. 91 reviews
Save with
Honeywell Home Smart Room Sensor Designed for the T9 Series Thermostat $36.00
$3600
current price $36.00Honeywell Home Smart Room Sensor Designed for the T9 Series Thermostat
243.9 out of 5 Stars. 24 reviews
Save with
Ecobee EB-RSHM2PK-01 Decibel Rating 1 Maximum Range 1 Range White Household Sensors and Alarms Smart Sensor 2 Pieces 2 Pack $75.00 Was $99.00
Now$7500
current price Now $75.00, Was $99.00$99.00
Ecobee EB-RSHM2PK-01 Decibel Rating 1 Maximum Range 1 Range White Household Sensors and Alarms Smart Sensor 2 Pieces 2 Pack
1924.4 out of 5 Stars. 192 reviews
Bitiwend, 16ft Black Motion Household Sensors & Alarms
Bitiwend, 16ft Black Motion Household Sensors & Alarms
844.1 out of 5 Stars. 84 reviews
Save with
Arlo All-in-One Sensor with 8 sensing functions for Home Security System MS1001-100NAS $29.99
$2999
current price $29.99Arlo All-in-One Sensor with 8 sensing functions for Home Security System MS1001-100NAS
54.2 out of 5 Stars. 5 reviews
Save with
Best seller Bitiwend Door Alarm Sensor Bitiwend Wireless Door Chime Alert for Kids Safety Home (1 Receiver+3 Sensors)
Bitiwend Door Alarm Sensor Bitiwend Wireless Door Chime Alert for Kids Safety Home (1 Receiver+3 Sensors)
1314.1 out of 5 Stars. 131 reviews
Save with
Upgraded Smart WiFi Motion Sensor Detector Alarm Indoor with Siren, Phone App, USB Power, Alert Recording, Scheduled Working Times - Infrared Motion Sensor Alarm for Home Garage $22.88
$2288
current price $22.88Upgraded Smart WiFi Motion Sensor Detector Alarm Indoor with Siren, Phone App, USB Power, Alert Recording, Scheduled Working Times - Infrared Motion Sensor Alarm for Home Garage
Hosmart HY001-1R+1S, 30ft Rechargeable Household Sensor & Alarm $42.99
Sponsored
$4299
current price $42.99Hosmart HY001-1R+1S, 30ft Rechargeable Household Sensor & Alarm
74.7 out of 5 Stars. 7 reviews
Save with
Best seller Fixdono Natural Gas Detector, Digital Sound Warning Gas Detector, Natural Gas Leak Security Detection Detector, Alarm Monitor Plug-in Sensor for Home Kitchen Restaurant Hotel School Warehouse $17.99 Was $31.99
Sponsored
Now$1799
current price Now $17.99, Was $31.99$31.99
Fixdono Natural Gas Detector, Digital Sound Warning Gas Detector, Natural Gas Leak Security Detection Detector, Alarm Monitor Plug-in Sensor for Home Kitchen Restaurant Hotel School Warehouse
2854.4 out of 5 Stars. 285 reviews
Save with
Google Nest Temperature Sensor
Google Nest Temperature Sensor
11624.8 out of 5 Stars. 1162 reviews
Save with
MOBI Smart Home 2.4GHz WiFi Water Leak Sensor, Water Sensor, Water Detector Alarm; Water Leak & Flood Detector, Smart Notification App, Expand with Cameras & Smart Home Devices. Battery INCLUDED From $13.46
3 options
Available in additional 3 optionsFrom$1346
MOBI Smart Home 2.4GHz WiFi Water Leak Sensor, Water Sensor, Water Detector Alarm; Water Leak & Flood Detector, Smart Notification App, Expand with Cameras & Smart Home Devices. Battery INCLUDED
154.5 out of 5 Stars. 15 reviews
Save with
Clearance Sgokeen Wireless Door Sensor Door Entry Chime, Door Open Alert with 600ft Range LED Indicators Receivers + Sensors Wireless Door Alarm,58 Ringtones Black From $13.58
From$1358
Sgokeen Wireless Door Sensor Door Entry Chime, Door Open Alert with 600ft Range LED Indicators Receivers + Sensors Wireless Door Alarm,58 Ringtones Black
1114.2 out of 5 Stars. 111 reviews
Save with
Best seller Entry Sensor - Window and Door Protection - Compatible with Gen 3 Home Security System Was $49.99
Entry Sensor - Window and Door Protection - Compatible with Gen 3 Home Security System
324.7 out of 5 Stars. 32 reviews
Save with
Entry Sensor $13.49 Was $14.99
Now$1349
current price Now $13.49, Was $14.99$14.99
Entry Sensor
774.7 out of 5 Stars. 77 reviews
C by GE Wire-Free Motion Smart Sensor, Battery Powered Motion Sensor, Bluetooth, Ambient Light Detection, White, 1-Pack $18.75 Was $24.99
Now$1875
current price Now $18.75, Was $24.99$24.99
C by GE Wire-Free Motion Smart Sensor, Battery Powered Motion Sensor, Bluetooth, Ambient Light Detection, White, 1-Pack
494.2 out of 5 Stars. 49 reviews
Clearance Smart WiFi Door & Window Sensor - Wireless Home Security Entry Detector with Real-Time Message Notifications, Ideal for Monitoring Door/Window Open Status in Smart Homes Was $6.99
Smart WiFi Door & Window Sensor - Wireless Home Security Entry Detector with Real-Time Message Notifications, Ideal for Monitoring Door/Window Open Status in Smart Homes
Philips Hue Smart Motion Sensor, Hub Required $65.82
$6582
current price $65.82Philips Hue Smart Motion Sensor, Hub Required
44 out of 5 Stars. 4 reviews
YoLink LoRa Smart Outdoor Motion Detector Sensor, Driveway Alert, Property Invasion/Tresspassing Detector, 1/4 Mile Open Air Range, Email/SMS/Push Alerts, Alexa, IFTTT, Home Assistant (Hub Required) From $35.59
Sponsored
From$3559
YoLink LoRa Smart Outdoor Motion Detector Sensor, Driveway Alert, Property Invasion/Tresspassing Detector, 1/4 Mile Open Air Range, Email/SMS/Push Alerts, Alexa, IFTTT, Home Assistant (Hub Required)
124.8 out of 5 Stars. 12 reviews
Natural Gas Detector, Digital Sound Warning Gas Detector, LCD/LPG/LNG Natural Gas Leak Security Detection Detector, Alarm Monitor Plug-in Sensor for Home Kitchen Restaurant Hotel School Warehouse $22.99 Was $26.89
Sponsored
Now$2299
current price Now $22.99, Was $26.89$26.89
Natural Gas Detector, Digital Sound Warning Gas Detector, LCD/LPG/LNG Natural Gas Leak Security Detection Detector, Alarm Monitor Plug-in Sensor for Home Kitchen Restaurant Hotel School Warehouse
24.5 out of 5 Stars. 2 reviews
Save with
Best seller Door Window Alarm, Personal Security Window, Burglar Alarm, Home Security Wireless Magnetic Sensor Anti-Theft Alarm (4 Pcs) Home Alarm(Batteries not included) From $10.99
2 options
Available in additional 2 optionsFrom$1099
Door Window Alarm, Personal Security Window, Burglar Alarm, Home Security Wireless Magnetic Sensor Anti-Theft Alarm (4 Pcs) Home Alarm(Batteries not included)
2203.8 out of 5 Stars. 220 reviews
Save with
Tuya Smart Temperature and Humidity Sensor WiFi APP Remote Monitor for Smart Home Var SmartLife Work with Alexa $11.56
$1156
current price $11.56Tuya Smart Temperature and Humidity Sensor WiFi APP Remote Monitor for Smart Home Var SmartLife Work with Alexa
2 Packs Smart WiFi Door Sensor Alarm System with Remote APP Alerts 10 Chimes DIY Security for Home Office Pet Safety 2.4GHz Wireless Expandable up to 100 Devices From $22.67
2 options
Available in additional 2 optionsFrom$2267
2 Packs Smart WiFi Door Sensor Alarm System with Remote APP Alerts 10 Chimes DIY Security for Home Office Pet Safety 2.4GHz Wireless Expandable up to 100 Devices
Riousery Smart Home Temperature And Humidity Sensor High Accuracy 2.4GHz Wireless Digital Hygrometer Indoor Thermometer with LED Indicator For Room 4.72 inches / 12 cm $23.21
$2321
current price $23.21Riousery Smart Home Temperature And Humidity Sensor High Accuracy 2.4GHz Wireless Digital Hygrometer Indoor Thermometer with LED Indicator For Room 4.72 inches / 12 cm
Wireless Smart Door Window Sensor Alarm, Home Security System with Real-Time Alerts & Instant App Notifications, Easy Installation for Houses Apartments Cabinets, White Plastic Housing $6.19
$619
current price $6.19Wireless Smart Door Window Sensor Alarm, Home Security System with Real-Time Alerts & Instant App Notifications, Easy Installation for Houses Apartments Cabinets, White Plastic Housing
2Pairs Smart Door Sensor, WiFi Window Door Sensor Alarm, Contact Sensor for Home Security, Smart Home Automation $15.18
$1518
current price $15.182Pairs Smart Door Sensor, WiFi Window Door Sensor Alarm, Contact Sensor for Home Security, Smart Home Automation
15 out of 5 Stars. 1 reviews
Hosmart HY001-1R+1S, 30ft Rechargeable Household Sensor & Alarm $42.99
$4299
current price $42.99Hosmart HY001-1R+1S, 30ft Rechargeable Household Sensor & Alarm
74.7 out of 5 Stars. 7 reviews
Save with
Homezone Wi-Fi Smart Wireless Window/Door Alarm Sensor, White, 1 Alarm Included From $19.97
2 options
Available in additional 2 optionsFrom$1997
Homezone Wi-Fi Smart Wireless Window/Door Alarm Sensor, White, 1 Alarm Included
374.2 out of 5 Stars. 37 reviews
Save with
Flash Deal Inkird Home Radon Detector, Portable Radon Meter, Short-Term and Long-Term Accurate Monitoring 2-Year Battery,White From $73.57 Was $81.75
Sponsored
From$7357
$81.75
Inkird Home Radon Detector, Portable Radon Meter, Short-Term and Long-Term Accurate Monitoring 2-Year Battery,White
204.4 out of 5 Stars. 20 reviews
Save with
KFFKFF Wireless Door Chime, DC 12V, Contact Sensor Alarm with 656 ft Range, App-Controlled Remote, Door Alert System for Business, Store, Home, Office (6 Sensors + 1 Receiver) $50.99 $50.99/ca
Sponsored
$5099
current price $50.99$50.99/ca
KFFKFF Wireless Door Chime, DC 12V, Contact Sensor Alarm with 656 ft Range, App-Controlled Remote, Door Alert System for Business, Store, Home, Office (6 Sensors + 1 Receiver)
Save with
M Buder Smart Wireless Human Body Motion Sensor with Light Intensity Detector, 360-Degree Rotation Holder, 23 Feet Range, ZigBee Compatible for Indoor Home Security $25.65
$2565
current price $25.65M Buder Smart Wireless Human Body Motion Sensor with Light Intensity Detector, 360-Degree Rotation Holder, 23 Feet Range, ZigBee Compatible for Indoor Home Security
Eve Door & Window (Matter) Smart contact sensor for doors & windows, open/closed state, automatic control of accessories, notifications, Thread $31.95
$3195
current price $31.95Eve Door & Window (Matter) Smart contact sensor for doors & windows, open/closed state, automatic control of accessories, notifications, Thread
Save with
Vivitar Smart Home Wi-Fi Door Sensor $20.38
$2038
current price $20.38Vivitar Smart Home Wi-Fi Door Sensor
12 out of 5 Stars. 1 reviews
XODO Motion Sensor, Smart Home Security Motion Detector with 360 Degree Detection, Easy Install, 2-Pack $19.99 $19.99/lb
$1999
current price $19.99$19.99/lb
XODO Motion Sensor, Smart Home Security Motion Detector with 360 Degree Detection, Easy Install, 2-Pack
113.3 out of 5 Stars. 11 reviews
Smart WiFi Door Sensor, Wireless Window Sensor Real-Time Message Notification, Home Security Door Open Entry Sensor with Smart Life App Voice Control $10.69 Was $13.49
Now$1069
current price Now $10.69, Was $13.49$13.49
Smart WiFi Door Sensor, Wireless Window Sensor Real-Time Message Notification, Home Security Door Open Entry Sensor with Smart Life App Voice Control
Tuya ZigBee Human Presence Sensor Intelligent PIR+Radar+Brightness APP Control Smart Home Devices,1 x Human presence sensor 1 x USB Type-C Cable,White $19.79
$1979
current price $19.79Tuya ZigBee Human Presence Sensor Intelligent PIR+Radar+Brightness APP Control Smart Home Devices,1 x Human presence sensor 1 x USB Type-C Cable,White
YAHHU WIFI Door Sensor Tuya APP Control Door Window Opening Security Alarm Sensor Magnetic Switch Wireless Detector Compatible with Alexa Google Home IFTTT ABS Material 3.74 inches / 9.5 cm $19.77
$1977
current price $19.77YAHHU WIFI Door Sensor Tuya APP Control Door Window Opening Security Alarm Sensor Magnetic Switch Wireless Detector Compatible with Alexa Google Home IFTTT ABS Material 3.74 inches / 9.5 cm
HomeZone Wi-Fi Smart Keypad Controlled Window or Door Alarm with Magnetic Switch, Compatible with Alexa and Google Assistant, White, 4 oz $14.97
$1497
current price $14.97HomeZone Wi-Fi Smart Keypad Controlled Window or Door Alarm with Magnetic Switch, Compatible with Alexa and Google Assistant, White, 4 oz
663.6 out of 5 Stars. 66 reviews
Save with
Zigbee Smart Human Presence Sensor Mini Human Motion Sensor Infrared Light Sensor Detector with Alarm for Home Office $14.53
$1453
current price $14.53Zigbee Smart Human Presence Sensor Mini Human Motion Sensor Infrared Light Sensor Detector with Alarm for Home Office
Tuya ZigBee Human Presence Sensor with Bracket Intelligent PIR+Radar+Brightness APP Control Smart Home Devices,1 x Human presence sensor 1 x USB Type-C Cable 1 x Bracket,White $22.89
$2289
current price $22.89Tuya ZigBee Human Presence Sensor with Bracket Intelligent PIR+Radar+Brightness APP Control Smart Home Devices,1 x Human presence sensor 1 x USB Type-C Cable 1 x Bracket,White
WiFi Door and Window Sensor, Wireless DIY smart Home Security System, Featuring APP Alarm Notifications, in Collaboration with Alexa/Smart Life/Tuya, Suitable for Houses and Apartments
WiFi Door and Window Sensor, Wireless DIY smart Home Security System, Featuring APP Alarm Notifications, in Collaboration with Alexa/Smart Life/Tuya, Suitable for Houses and Apartments
VALSEEL Smart WiFi Door Sensor,Wireless Window Sensor Real-time Message Notification,Home Security Door Open Entry Sensor $8.09 Was $8.99
Now$809
current price Now $8.09, Was $8.99$8.99
VALSEEL Smart WiFi Door Sensor,Wireless Window Sensor Real-time Message Notification,Home Security Door Open Entry Sensor
Supplemental Hosmart Alarm Sensor (1 Sensor coffee ) From $34.99
From$3499
Supplemental Hosmart Alarm Sensor (1 Sensor coffee )
914.5 out of 5 Stars. 91 reviews
Save with
WiFi Smart Door Sensor, Wireless Door Window Sensor Alarm, Mini Contact Sensor for Home Security, Push Notification, Volume Adjustable, Timer, Compatible with Alexa/Google Assistant 2 Pack $29.56
$2956
current price $29.56WiFi Smart Door Sensor, Wireless Door Window Sensor Alarm, Mini Contact Sensor for Home Security, Push Notification, Volume Adjustable, Timer, Compatible with Alexa/Google Assistant 2 Pack
Vivint dw12 window and door sensor $32.97
$3297
current price $32.97Vivint dw12 window and door sensor
55 out of 5 Stars. 5 reviews
Glassbreak Sensor $39.99
$3999
current price $39.99Glassbreak Sensor
314.8 out of 5 Stars. 31 reviews
Save with
WiFi Smart Motion Sensor Alarm Indoor Infrared PIR Detector Siren Tuya Smart APP Control Wireless Trigger Player Home Security
WiFi Smart Motion Sensor Alarm Indoor Infrared PIR Detector Siren Tuya Smart APP Control Wireless Trigger Player Home Security
24.5 out of 5 Stars. 2 reviews
Tuya Smart Home WiFi Temperature & Humidity Sensor with 1M External Probe App Remote V y5396 $18.99
$1899
current price $18.99Tuya Smart Home WiFi Temperature & Humidity Sensor with 1M External Probe App Remote V y5396
Popular in Smart Home Sensor
Related Products
Honeywell Home 5800Mini Wireless Door/ Window Contact
Honeywell Home 5800Mini Wireless Door/ Window Contact$32.96current price $32.96Tuya Door Window Sensor Control Door Sensor Contact Sensor Magnetic Sensor Works Alexa ,Easy Install
Tuya Door Window Sensor Control Door Sensor Contact Sensor Magnetic Sensor Works Alexa ,Easy Install$45.86current price $45.86Honeywell Ademco 5816WMWH White Door/Window Transmitter w/Magnet
Honeywell Ademco 5816WMWH White Door/Window Transmitter w/Magnet$40.55current price $40.55Door/Window Sensor with External Contact Input
Door/Window Sensor with External Contact Input$31.99current price $31.99Qolsys QW9104840 IQ Remote Touchscreen Alarm Keypad
Qolsys QW9104840 IQ Remote Touchscreen Alarm Keypad$279.99current price $279.99TONAIN 90 dB, White Magnetic Household Sensors & Alarms
TONAIN 90 dB, White Magnetic Household Sensors & Alarms$4.48current price $4.48Honeywell WAVE2 Siren, Dual Tone, Wall Mount, Warning Alarm
Honeywell WAVE2 Siren, Dual Tone, Wall Mount, Warning Alarm$22.85current price $22.85Wsdcam Glass Break Sensor Alarm 125dB Wireless Detector Vibration for Window Door Security - 4 Pack
Wsdcam Glass Break Sensor Alarm 125dB Wireless Detector Vibration for Window Door Security - 4 Pack$27.99current price $27.99Wireless Smart Door Sensor Ev1527 Encoding Format For Wireless GSM Home Security Alarm System Window Magnet Entry Sensor ,Easy Install
Wireless Smart Door Sensor Ev1527 Encoding Format For Wireless GSM Home Security Alarm System Window Magnet Entry Sensor ,Easy Install$77.40current price $77.40Honeywell Battery Operated Security Alarm with Keypad
Honeywell Battery Operated Security Alarm with Keypad$234.83current price $234.83Door Window Alarm,Voice Alarm Door Alarm -theft Voice Door Apartment Voice And Voice Door Window Alarm Sound And App Apartment Wifi Voice Apartment Door Alarm Shieny White 2 Pack
Door Window Alarm,Voice Alarm Door Alarm -theft Voice Door Apartment Voice And Voice Door Window Alarm Sound And App Apartment Wifi Voice Apartment Door Alarm Shieny White 2 Pack$29.49current price $29.49Smart Siren Alarm, Loud 110 dB, Wireless Alarm for Home Security/Intrusion/Burglar Alarm, Panic Alarm, Audible Alerts, Remote Control, Works with Alexa, Google, Home Assistant, IFTTT - Hub Required
Smart Siren Alarm, Loud 110 dB, Wireless Alarm for Home Security/Intrusion/Burglar Alarm, Panic Alarm, Audible Alerts, Remote Control, Works with Alexa, Google, Home Assistant, IFTTT - Hub Required$28.99current price $28.99Caregiver Smart Solutions Individual Temperature and Humidity Sensor
Caregiver Smart Solutions Individual Temperature and Humidity Sensor$79.00current price $79.00
