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Surveillance EquipmentAll CamerasAll Home AssistantsAll PhonesAll Security CamerasApple HomeKit Compatible DevicesArloCell Phone AccessoriesComputer AccessoriesComputer MonitorsDesktop ComputersGoogleGoogle HomeGrades 6-12 ElectronicsHeadphonesHome Audio, Speakers & SoundbarsiPad & TabletsLaptop AccessoriesLaptopsNetworkingPC GamingPortable AudioRestored AutomotiveRestored HomeRestored PremiumRestored TechRestored ToolsSecurity 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 AccessoriesWorks with AlexaWorks with Google Assistant
Detector Sensor(454)
Uses item details. Price when purchased online
(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
1284.2 out of 5 Stars. 128 reviews
Briidea Power Failure Outage Alarm for Freezer, with LED Indicator Lights and 80-120dB Adjustable Alarm, Perfect for Monitoring Refrigerators, Freezers, and Sewage From $19.99
Sponsored
From$1999
Briidea Power Failure Outage Alarm for Freezer, with LED Indicator Lights and 80-120dB Adjustable Alarm, Perfect for Monitoring Refrigerators, Freezers, and Sewage
164.8 out of 5 Stars. 16 reviews
Orbit B-Hyve Smart Flood, Leak Detector and Water Sensors, 3 Pack $34.39
Sponsored
$3439
current price $34.39Orbit B-Hyve Smart Flood, Leak Detector and Water Sensors, 3 Pack
133.9 out of 5 Stars. 13 reviews
Briidea Power Outage Alarm with LED Indicator Lights and 80-120dB Adjustable Alarm, Perfect for Monitoring Refrigerators, Freezers, and Sewage, 2 pack $39.99
Sponsored
$3999
current price $39.99Briidea Power Outage Alarm with LED Indicator Lights and 80-120dB Adjustable Alarm, Perfect for Monitoring Refrigerators, Freezers, and Sewage, 2 pack
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
Best seller
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
2934.4 out of 5 Stars. 293 reviews
Clearance GasKnight Natural Gas Detector & Propane Detector. Natural Gas Leak Detection and Monitor for Home, Kitchen, Camper, Trailer or RV. Plug-In Gas Leak Sensor for LPG, LNG, Methane & Butane Gases From $21.99
Clearance
2 options
Available in additional 2 optionsFrom$2199
GasKnight Natural Gas Detector & Propane Detector. Natural Gas Leak Detection and Monitor for Home, Kitchen, Camper, Trailer or RV. Plug-In Gas Leak Sensor for LPG, LNG, Methane & Butane Gases
604.7 out of 5 Stars. 60 reviews
NFTIGB Smart WiFi Light Sensor Zigbee Brightness Detector Automatic Adjustment Wireless Connection for Living Room Bedroom Household Security 2.36 inches / 6 cm $25.64
$2564
current price $25.64NFTIGB Smart WiFi Light Sensor Zigbee Brightness Detector Automatic Adjustment Wireless Connection for Living Room Bedroom Household Security 2.36 inches / 6 cm
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
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
194.6 out of 5 Stars. 19 reviews
Driveway Alarm Wireless Outside Weatherproof, Solar Motion Sensor Detector, 1/2 Mile Long Range Driveway Alarm System with Portable Receiver, Home Security Alert System $35.99 Was $35.99
$3599
current price $35.99, Was $35.99$35.99
Driveway Alarm Wireless Outside Weatherproof, Solar Motion Sensor Detector, 1/2 Mile Long Range Driveway Alarm System with Portable Receiver, Home Security Alert System
94.8 out of 5 Stars. 9 reviews
Inkird Home Radon Detector, Portable Radon Meter, Short-Term and Long-Term Accurate Monitoring 2-Year Battery,White From $81.75 Was $81.75
Sponsored
From$8175
$81.75
Inkird Home Radon Detector, Portable Radon Meter, Short-Term and Long-Term Accurate Monitoring 2-Year Battery,White
214.4 out of 5 Stars. 21 reviews
Vivnt Recessed Door Contact Sensor VS-DW2100-345 $17.95 Was $19.95
Sponsored
Now$1795
current price Now $17.95, Was $19.95$19.95
Vivnt Recessed Door Contact Sensor VS-DW2100-345
Rollback Geeni Smart WiFi Water Leak Detector & Sensor, 80dB Alarm for Basement, Kitchen, Bathroom, White $14.99 Was $18.99
Rollback
Now$1499
current price Now $14.99, Was $18.99$18.99
Geeni Smart WiFi Water Leak Detector & Sensor, 80dB Alarm for Basement, Kitchen, Bathroom, White
74.3 out of 5 Stars. 7 reviews
Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resistant Motion Sensor&Detector-DIY Security Alert-Monitor&Protect Outdoor/Indoor Property - 1 Receiver and 2 Sensors $43.99
$4399
current price $43.99Driveway Alarm- 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resistant Motion Sensor&Detector-DIY Security Alert-Monitor&Protect Outdoor/Indoor Property - 1 Receiver and 2 Sensors
354.2 out of 5 Stars. 35 reviews
CPVan Motion Sensor Alarm, 125dB, 328ft Range White PIR Motion Detector
CPVan Motion Sensor Alarm, 125dB, 328ft Range White PIR Motion Detector
294 out of 5 Stars. 29 reviews
Domqga 105Db, 22.96ft Range White PIR Motion Detector Alarm Household Sensors & Alarms 2 Pieces Pack $14.10
$1410
current price $14.10Domqga 105Db, 22.96ft Range White PIR Motion Detector Alarm Household Sensors & Alarms 2 Pieces Pack
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 $25.47
$2547
current price $25.47M Buder Smart Wireless Human Body Motion Sensor with Light Intensity Detector, 360-Degree Rotation Holder, 23 Feet Range, ZigBee Compatible for Indoor Home Security
M Buder Motion Activated Sensor Detector Switch for Cabinet Light PIR Infrared Sensing DC6-24V Switch Home Improvement Motion Sensor LED Light Controller (6.3 inches / 16 cm) $10.84
$1084
current price $10.84M Buder Motion Activated Sensor Detector Switch for Cabinet Light PIR Infrared Sensing DC6-24V Switch Home Improvement Motion Sensor LED Light Controller (6.3 inches / 16 cm)
Driveway Alarm Motion Sensor Alarm Weatherproof Motion Detector Home Security Alert System for Outdoor Alarms Detection $16.32
$1632
current price $16.32Driveway Alarm Motion Sensor Alarm Weatherproof Motion Detector Home Security Alert System for Outdoor Alarms Detection
223.4 out of 5 Stars. 22 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 $5.89 Was $6.99
Clearance
Now$589
current price Now $5.89, Was $6.99$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
YoLink Smart Power Fail Alarm & Hub Kit, Smart Home Starter Kit with AC Power Outage Alert, LoRa Long-Range, Remote Monitoring, App Alerts, Text/SMS, Email Alerts, Alexa, IFTTT, Google Assistant From $34.99
Sponsored
From$3499
YoLink Smart Power Fail Alarm & Hub Kit, Smart Home Starter Kit with AC Power Outage Alert, LoRa Long-Range, Remote Monitoring, App Alerts, Text/SMS, Email Alerts, Alexa, IFTTT, Google Assistant
124.8 out of 5 Stars. 12 reviews
Shelly Wi-Fi Gas Sensor (Gas LPG) $52.49 Was $69.99
Sponsored
Now$5249
current price Now $52.49, Was $69.99$69.99
Shelly Wi-Fi Gas Sensor (Gas LPG)
11 out of 5 Stars. 1 reviews
YoLink Motion Sensor, 1/4 Mile World's Longest Range Smart Home Indoor Wireless Motion Detector Sensor From $23.99
From$2399
YoLink Motion Sensor, 1/4 Mile World's Longest Range Smart Home Indoor Wireless Motion Detector Sensor
154.3 out of 5 Stars. 15 reviews
Zigbee Motion Sensor Smart Motion Detector for Home Security Wireless Motion Sensor App Remote Monitor,1 * Human presence sensor,White $11.79
$1179
current price $11.79Zigbee Motion Sensor Smart Motion Detector for Home Security Wireless Motion Sensor App Remote Monitor,1 * Human presence sensor,White
Wireless Home Security Driveway Alarm, Motion Sensor Detect Alert, Store Door Entry Chime Doorbell with 1 PIR Motion Sensor Detectors and 1 Wireless Plug-in Receiver for Front Doors Window Frames $14.98
$1498
current price $14.98Wireless Home Security Driveway Alarm, Motion Sensor Detect Alert, Store Door Entry Chime Doorbell with 1 PIR Motion Sensor Detectors and 1 Wireless Plug-in Receiver for Front Doors Window Frames
94.2 out of 5 Stars. 9 reviews
Rirool Natural Gas Detector with Digital Display, 85dB Alarm, Plug-in Gas Leak Sensor for Home, Kitchen, Restaurant, Hotel, School, Warehouse Safety Monitor $16.99
$1699
current price $16.99Rirool Natural Gas Detector with Digital Display, 85dB Alarm, Plug-in Gas Leak Sensor for Home, Kitchen, Restaurant, Hotel, School, Warehouse Safety Monitor
314.8 out of 5 Stars. 31 reviews
PIR Sensor Motion Detector Detector Anti-Pet PIR Motion Sensor Wired Alarm Dual Infrared Detector Pet Immune For Home Burglar Security Alarm System $10.08
$1008
current price $10.08PIR Sensor Motion Detector Detector Anti-Pet PIR Motion Sensor Wired Alarm Dual Infrared Detector Pet Immune For Home Burglar Security Alarm System
M Buder Entrance Welcome Doorbell Infrared Motion Sensor Alarm Detector for Shop Store, Black, Battery Operated, 38 Ringtones, 2.91 inches / 7.4 cm Length $13.20
$1320
current price $13.20M Buder Entrance Welcome Doorbell Infrared Motion Sensor Alarm Detector for Shop Store, Black, Battery Operated, 38 Ringtones, 2.91 inches / 7.4 cm Length
4X Camping Travel Portable Mini PIR Infrared Motion Sensor Detector Alarm 120DB Wireless Home Security Anti-Theft $24.21
$2421
current price $24.214X Camping Travel Portable Mini PIR Infrared Motion Sensor Detector Alarm 120DB Wireless Home Security Anti-Theft
NFTIGB Liquid Level Transmitter Submersible Water Sensor Detector 4-20mA DC12-30V Stainless Steel Probe 3m / 118.11 inches for Water Tanks From $34.40
3 options
Available in additional 3 optionsFrom$3440
NFTIGB Liquid Level Transmitter Submersible Water Sensor Detector 4-20mA DC12-30V Stainless Steel Probe 3m / 118.11 inches for Water Tanks
Clearance GasKnight Natural Gas Detector & Propane Detector. Natural Gas Leak Detection and Monitor for Home, Kitchen, Camper, Trailer or RV. Plug-In Gas Leak Sensor for LPG, LNG, Methane & Butane Gases From $21.99
Clearance
Sponsored
From$2199
GasKnight Natural Gas Detector & Propane Detector. Natural Gas Leak Detection and Monitor for Home, Kitchen, Camper, Trailer or RV. Plug-In Gas Leak Sensor for LPG, LNG, Methane & Butane Gases
604.7 out of 5 Stars. 60 reviews
SITERWELL Smoke Detector, 10 Year Product Life Fire Alarm with Magnetic Fastening Kit, Smoke Alarm with Photoelectric Sensor and Low Battery Warning Function for House, ETL-9th Listed, GS509A, 5 Pack From $19.52
Sponsored
From$1952
SITERWELL Smoke Detector, 10 Year Product Life Fire Alarm with Magnetic Fastening Kit, Smoke Alarm with Photoelectric Sensor and Low Battery Warning Function for House, ETL-9th Listed, GS509A, 5 Pack
5784.4 out of 5 Stars. 578 reviews
Driveway Alarm 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resistant Motion Sensor&Detector-DIY Security Alert System-Monitor&Protect Outdoor/Indoor Property, 1 Receiver and 1 Sensor $37.99
$3799
current price $37.99Driveway Alarm 1/2 Mile Long Range Wireless Driveway Alarm Outdoor Weather Resistant Motion Sensor&Detector-DIY Security Alert System-Monitor&Protect Outdoor/Indoor Property, 1 Receiver and 1 Sensor
244.6 out of 5 Stars. 24 reviews
Driveway Sensor- Extra Solar Wireless Outdoor Weatherproof Motion Sensor/Detector for HTZSAFE Alarms-1/2 Mile Wireless Transmission Range-Up to 70FT Sensor Range 3 Adjustable Sensitivities $39.99
$3999
current price $39.99Driveway Sensor- Extra Solar Wireless Outdoor Weatherproof Motion Sensor/Detector for HTZSAFE Alarms-1/2 Mile Wireless Transmission Range-Up to 70FT Sensor Range 3 Adjustable Sensitivities
WIFI Wireless Smart Magnetic Door Window Sensor Detector Alarm For Google Home $11.95
$1195
current price $11.95WIFI Wireless Smart Magnetic Door Window Sensor Detector Alarm For Google Home
53.2 out of 5 Stars. 5 reviews
Wireless Driveway Alarm Motion Sensor Alert System 656FT Range Indoor Outdoor Waterproof Security Detector Kit with 2 Sensors 1 Receiver 38 Chimes 4 Volume Levels 433MHz $26.88
$2688
current price $26.88Wireless Driveway Alarm Motion Sensor Alert System 656FT Range Indoor Outdoor Waterproof Security Detector Kit with 2 Sensors 1 Receiver 38 Chimes 4 Volume Levels 433MHz
CAZONER Natural Gas Detector & Propane Detector, 10-Year Lifespan, Gas Leak Sensor for LPG, LNG, Home Kitchen RV Methane & Propane Alarm, LCD Screen $32.98
$3298
current price $32.98CAZONER Natural Gas Detector & Propane Detector, 10-Year Lifespan, Gas Leak Sensor for LPG, LNG, Home Kitchen RV Methane & Propane Alarm, LCD Screen
54.2 out of 5 Stars. 5 reviews
Solar Alarm Motion Detector with Sound Outdoor Motion Sensor 129db Barking Dog Strobe Light Gunshot Sound Alarm Detector Noise Maker Warning Lamp for Home Villa Yard Farm From $14.99
2 options
Available in additional 2 optionsFrom$1499
Solar Alarm Motion Detector with Sound Outdoor Motion Sensor 129db Barking Dog Strobe Light Gunshot Sound Alarm Detector Noise Maker Warning Lamp for Home Villa Yard Farm
12 out of 5 Stars. 1 reviews
PIR Infrared Motion Sensor Detector, DC 12V-24V Strip Light Motion Sensor Switch, for Cupboard Cabinet Stairs Kitchen $7.84
$784
current price $7.84PIR Infrared Motion Sensor Detector, DC 12V-24V Strip Light Motion Sensor Switch, for Cupboard Cabinet Stairs Kitchen
2Packs/Set WiFi Door Sensor Detector Smart, Wireless Window Sensor Real-time Alarm Compatible, Home Security Door Open Contact Sensor for Bussiness Burglar Alert From $13.99
2 options
Available in additional 2 optionsFrom$1399
2Packs/Set WiFi Door Sensor Detector Smart, Wireless Window Sensor Real-time Alarm Compatible, Home Security Door Open Contact Sensor for Bussiness Burglar Alert
23 out of 5 Stars. 2 reviews
2X Camping Travel Portable Mini PIR Infrared Motion Sensor Detector Alarm 120DB Wireless Home Security Anti-Theft $13.56
$1356
current price $13.562X Camping Travel Portable Mini PIR Infrared Motion Sensor Detector Alarm 120DB Wireless Home Security Anti-Theft
PIR Sensor Motion Detector Detector Anti-Pet PIR Motion Sensor Wired Alarm Dual Infrared Detector Pet Immune For Home Burglar Security Alarm System $10.02 Was $10.45
Now$1002
current price Now $10.02, Was $10.45$10.45
PIR Sensor Motion Detector Detector Anti-Pet PIR Motion Sensor Wired Alarm Dual Infrared Detector Pet Immune For Home Burglar Security Alarm System
Best seller 1/2 Mile Long Range Solar Wireless Driveway Alarm System IP65 Weatherproof Outdoor Motion Detectors&Sensor 120dB Siren Sound Light Security Alert System Monitor&Protect Outdoor/Indoor Property From $29.99
Best seller
8 options
Available in additional 8 optionsFrom$2999
1/2 Mile Long Range Solar Wireless Driveway Alarm System IP65 Weatherproof Outdoor Motion Detectors&Sensor 120dB Siren Sound Light Security Alert System Monitor&Protect Outdoor/Indoor Property
1344.6 out of 5 Stars. 134 reviews
RKZDSR Alarm System,Solar Alarm System,Fully Weather Proof Outdoor Motion Sensor & Detector Security Alert System,1 Receiver And 1 Sensors
RKZDSR Alarm System,Solar Alarm System,Fully Weather Proof Outdoor Motion Sensor & Detector Security Alert System,1 Receiver And 1 Sensors
13 out of 5 Stars. 1 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
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
RAINPOINT Floating Remote WiFi Water Leak Detector for Home Basement 3 Pack with Hub,Wireless Siren Alarm Leakage Sensor Email & APP Push Notification Kitchen Sink,Bathroom,Laundry,Warehouse $21.67
$2167
current price $21.67RAINPOINT Floating Remote WiFi Water Leak Detector for Home Basement 3 Pack with Hub,Wireless Siren Alarm Leakage Sensor Email & APP Push Notification Kitchen Sink,Bathroom,Laundry,Warehouse
15 out of 5 Stars. 1 reviews
Human Presence Detector Tuya Sensor Home Ultra Low Power Millimeter Wave Radar Breathing Motion Detection WiFi,1 * Human presence sensor,White $26.79
$2679
current price $26.79Human Presence Detector Tuya Sensor Home Ultra Low Power Millimeter Wave Radar Breathing Motion Detection WiFi,1 * Human presence sensor,White
2PCS Smart PIR Sensor Detector Switch 110V 220V Human Body Infrared Motion Sensor Indction Auto on Light Switches $7.53
$753
current price $7.532PCS Smart PIR Sensor Detector Switch 110V 220V Human Body Infrared Motion Sensor Indction Auto on Light Switches
11 out of 5 Stars. 1 reviews
Tuya Wifi Smart Pir Motion Sensor Detector Movement Sensor Smart Life App Wireless-Home Automation System Via Alexa Googles Home Wi-Fi $11.09 Was $18.37
Now$1109
current price Now $11.09, Was $18.37$18.37
Tuya Wifi Smart Pir Motion Sensor Detector Movement Sensor Smart Life App Wireless-Home Automation System Via Alexa Googles Home Wi-Fi
GREENCYCLE Wireless Motion Sensor Detector Alarm, Home Security Business Alert, Store Welcome Chime Door Entry Doorbell (918 Feet, 36 Tunes, 4 Volume Levels, LED Indicators), 1 Pack $22.89
$2289
current price $22.89GREENCYCLE Wireless Motion Sensor Detector Alarm, Home Security Business Alert, Store Welcome Chime Door Entry Doorbell (918 Feet, 36 Tunes, 4 Volume Levels, LED Indicators), 1 Pack
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