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Surveillance EquipmentAll CamerasAll GPS DevicesAll Home AssistantsAll PhonesAll Security CamerasApple HomeKit Compatible DevicesArloComputer AccessoriesComputer MonitorsDesktop ComputersGeneral Electronic AccessoriesGoogleGoogle HomeGPS TrackersGrades 6-12 ElectronicsiPad & TabletsLaptop AccessoriesLaptopsNetworkingPC GamingPortable AudioRestored 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 AccessoriesWink Compatible DevicesWorks with AlexaWorks with Google Assistant
Detector Sensor(440)
Uses item details. Price when purchased online
Best seller SITERWELL Smoke Detector, 10 Year Product Life Fire Alarm,Magnetic Fastening Kit, Smoke Alarm, Photoelectric Sensor,Low Battery Warning Function, ETL-9th Listed, GS509A, 1 Pack From $18.99
Sponsored
From$1899
SITERWELL Smoke Detector, 10 Year Product Life Fire Alarm,Magnetic Fastening Kit, Smoke Alarm, Photoelectric Sensor,Low Battery Warning Function, ETL-9th Listed, GS509A, 1 Pack
3804.4 out of 5 Stars. 380 reviews
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Briidea LD-078 110dB, Switch Household Sensors & Alarms $74.99
Sponsored
$7499
current price $74.99Briidea LD-078 110dB, Switch Household Sensors & Alarms
24 out of 5 Stars. 2 reviews
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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
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
Sponsored
From$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
654.4 out of 5 Stars. 65 reviews
Flash Deal 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 $15.99 Was $27.99
Now$1599
current price Now $15.99, Was $27.99$27.99
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
2284.3 out of 5 Stars. 228 reviews
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Clearance Rirool Natural Gas Detector with Digital Display, 85dB Alarm, Plug-in Gas Leak Sensor for Home, Kitchen, Restaurant, Hotel, School, Warehouse Safety Monitor $17.99 Was $24.99
Now$1799
current price Now $17.99, Was $24.99$24.99
Rirool Natural Gas Detector with Digital Display, 85dB Alarm, Plug-in Gas Leak Sensor for Home, Kitchen, Restaurant, Hotel, School, Warehouse Safety Monitor
194.7 out of 5 Stars. 19 reviews
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DSC PG9922 Wireless PowerG Glass Break Detector Sensor $89.00
$8900
current price $89.00DSC PG9922 Wireless PowerG Glass Break Detector Sensor
LYINGF Infrared Wireless Motion Sensor Alarm, Alert Detector for Home Security, Wireless PIR Sensor for Doors and Windows, Battery-Operated with Remote, Easy Setup for Indoor Use
LYINGF Infrared Wireless Motion Sensor Alarm, Alert Detector for Home Security, Wireless PIR Sensor for Doors and Windows, Battery-Operated with Remote, Easy Setup for Indoor Use
Geevon 6 Pack Water Leak Detectors for Home, 135dB Water Leak Sensor Flood Detection Water Alarms for Basements, Bathrooms, Kitchens, Garages, and Attics, Battery-Operated (Battery Included) Was $28.99
3 options
Available in additional 3 optionsGeevon 6 Pack Water Leak Detectors for Home, 135dB Water Leak Sensor Flood Detection Water Alarms for Basements, Bathrooms, Kitchens, Garages, and Attics, Battery-Operated (Battery Included)
25 out of 5 Stars. 2 reviews
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Fosmon WaveLink Wireless Motion Sensor Alarm, 500FT Battery Operated Motion Detector Alarm With Plug In Receiver, Weather Resistant Driveway Alarm, Indoor Outdoor Door Chime For Business, Store, Home $21.99
$2199
current price $21.99Fosmon WaveLink Wireless Motion Sensor Alarm, 500FT Battery Operated Motion Detector Alarm With Plug In Receiver, Weather Resistant Driveway Alarm, Indoor Outdoor Door Chime For Business, Store, Home
343.9 out of 5 Stars. 34 reviews
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YoLink LoRa Smart Door Sensor Starter Kit: - 1/4 Mile Open-Air Range, Door Left-Open Reminders,5 Years Battery Life, SMS/Text, Email & App Alerts, Alexa, IFTTT, Home Assistant From $16.95
Sponsored
From$1695
YoLink LoRa Smart Door Sensor Starter Kit: - 1/4 Mile Open-Air Range, Door Left-Open Reminders,5 Years Battery Life, SMS/Text, Email & App Alerts, Alexa, IFTTT, Home Assistant
294.6 out of 5 Stars. 29 reviews
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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
714.6 out of 5 Stars. 71 reviews
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Wsdcam Window Alarm Sensors 125dB Ultra-Slim Wireless Glass Break Detector Vibration Alarm 8 Pack $52.99
$5299
current price $52.99Wsdcam Window Alarm Sensors 125dB Ultra-Slim Wireless Glass Break Detector Vibration Alarm 8 Pack
134.4 out of 5 Stars. 13 reviews
3pcs Enhanced Wireless PIR Motion Sensor Alarm Detector 433MHz $18.63
$1863
current price $18.633pcs Enhanced Wireless PIR Motion Sensor Alarm Detector 433MHz
Best seller 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 $22.49
2 options
Available in additional 2 optionsFrom$2249
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
464.6 out of 5 Stars. 46 reviews
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Dual High Stability Sensors Detector Alarm with Automatic Reset Function $45.12
$4512
current price $45.12Dual High Stability Sensors Detector Alarm with Automatic Reset Function
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
134.5 out of 5 Stars. 13 reviews
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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 $14.99
3 options
Available in additional 3 optionsFrom$1499
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
94.9 out of 5 Stars. 9 reviews
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Best seller Driveway Alarm Wireless, Outdoor Motion Sensor Alarm with Motion Detector, Weatherproof Solar Driveway Alarm, 700 ft Range, 1 Receiver and 1 Sensor, Home Security System, Black $27.99
$2799
current price $27.99Driveway Alarm Wireless, Outdoor Motion Sensor Alarm with Motion Detector, Weatherproof Solar Driveway Alarm, 700 ft Range, 1 Receiver and 1 Sensor, Home Security System, Black
784.2 out of 5 Stars. 78 reviews
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5A DC5-24V Mini USB PIR Infrared Motion Sensor Detector Automatic Switch for LED Light Strip Intelligent Sensing(Black) $8.99
$899
current price $8.995A DC5-24V Mini USB PIR Infrared Motion Sensor Detector Automatic Switch for LED Light Strip Intelligent Sensing(Black)
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
64.2 out of 5 Stars. 6 reviews
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Best seller GasKnight 2.0 Natural Gas Detector, Propane Detector, Natural Gas Leak Detection. Plug-In Gas Leak Alarm W LCD Display $34.99
Sponsored
$3499
current price $34.99GasKnight 2.0 Natural Gas Detector, Propane Detector, Natural Gas Leak Detection. Plug-In Gas Leak Alarm W LCD Display
583.9 out of 5 Stars. 58 reviews
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Driveway Alarm Wireless Outside Motion Sensor Alarm with Receiver Weatherproof Infrared Sensor, Indoor Home Security Business Alert System Detector(1Pcs)
Driveway Alarm Wireless Outside Motion Sensor Alarm with Receiver Weatherproof Infrared Sensor, Indoor Home Security Business Alert System Detector(1Pcs)
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
33.7 out of 5 Stars. 3 reviews
Leak Alert Electronic Water Detector Flood Sensor Alarm From $14.99
From$1499
Leak Alert Electronic Water Detector Flood Sensor Alarm
94.8 out of 5 Stars. 9 reviews
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XaTanion Motion Sensor 1Pc Single Beam Infrared Detector Alarm Barrier Sensor Photo electric Home,Black,2.8*0.92 Inch
XaTanion Motion Sensor 1Pc Single Beam Infrared Detector Alarm Barrier Sensor Photo electric Home,Black,2.8*0.92 Inch
Deago 2 Pack Water Leak Sensor Detector Flood Alarm Battery Operated Leak Alert Water Detector for Kitchen Bathroom Basement From $10.49
2 options
Available in additional 2 optionsFrom$1049
Deago 2 Pack Water Leak Sensor Detector Flood Alarm Battery Operated Leak Alert Water Detector for Kitchen Bathroom Basement
Clearance Rongsi Driveway Alarm,Wireless Home Security Driveway Alarm 1 Receiver and 1 PIR Motion Sensor Detector 1000 FT Range Extra Infrared Alarm System Kit $18.99 Was $23.99
Now$1899
current price Now $18.99, Was $23.99$23.99
Rongsi Driveway Alarm,Wireless Home Security Driveway Alarm 1 Receiver and 1 PIR Motion Sensor Detector 1000 FT Range Extra Infrared Alarm System Kit
404.1 out of 5 Stars. 40 reviews
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Teissuly Home Graffiti WiFi Door Magnetic Sensor Intelligent Door And Window Intrusion Detector Alarm
Teissuly Home Graffiti WiFi Door Magnetic Sensor Intelligent Door And Window Intrusion Detector Alarm
CPVan Motion Sensor Alarm, 125dB, 328ft Range White PIR Motion Detector
CPVan Motion Sensor Alarm, 125dB, 328ft Range White PIR Motion Detector
263.9 out of 5 Stars. 26 reviews
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Best seller Driveway Alarm Wireless, Outdoor Motion Sensor Alarm with Motion Detector, Weatherproof Solar Driveway Alarm, 700 ft Range, 1 Receiver and 1 Sensor, Home Security System, Black $27.99
Sponsored
$2799
current price $27.99Driveway Alarm Wireless, Outdoor Motion Sensor Alarm with Motion Detector, Weatherproof Solar Driveway Alarm, 700 ft Range, 1 Receiver and 1 Sensor, Home Security System, Black
784.2 out of 5 Stars. 78 reviews
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SimpliSafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System $42.35
Sponsored
$4235
current price $42.35SimpliSafe 4 Pack Entry Sensor ES3 Door Window Protection Magnetic Home Security System
LAILLSH 1PC Infrared Wireless Alarm Motion Sensor Alert Detector, Wireless Alert System 400 Feet Range - 2025 New Arrival🔥 Was $22.99
LAILLSH 1PC Infrared Wireless Alarm Motion Sensor Alert Detector, Wireless Alert System 400 Feet Range - 2025 New Arrival🔥
GJX Smart Natural Gas Detector Wifi LCD Display Leak Alarm Sensor For Home Safety $19.78
$1978
current price $19.78GJX Smart Natural Gas Detector Wifi LCD Display Leak Alarm Sensor For Home Safety
14 out of 5 Stars. 1 reviews
Goodhd Infrared Alarm Sensor Motion Sensor Outdoor Wired Alarm Detector Home Security-Without Stand
Goodhd Infrared Alarm Sensor Motion Sensor Outdoor Wired Alarm Detector Home Security-Without Stand
YoLink LoRa Smart Vibration Sensor; Smart Shock, Glass Break, Tamper, Movement Detector, Generator Running, Email/SMS/Push Alerts, 1/4 Mile Open Air Range, Alexa, Hub is not Included From $24.59
From$2459
YoLink LoRa Smart Vibration Sensor; Smart Shock, Glass Break, Tamper, Movement Detector, Generator Running, Email/SMS/Push Alerts, 1/4 Mile Open Air Range, Alexa, Hub is not Included
74.7 out of 5 Stars. 7 reviews
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HTZSAFE 1/2Mile Solar Driveway Alarm System-Up to 70FT Wide Sensor Range 3 Adjustable Sensitivities-Fully Weatherproof Outdoor Motion Sensor&Detector DIY Security Alert System $49.99 Was $59.99
Now$4999
current price Now $49.99, Was $59.99$59.99
HTZSAFE 1/2Mile Solar Driveway Alarm System-Up to 70FT Wide Sensor Range 3 Adjustable Sensitivities-Fully Weatherproof Outdoor Motion Sensor&Detector DIY Security Alert System
35 out of 5 Stars. 3 reviews
Topvico Water Alarms for Basements, Heater Leak Detector, Sump Pump Overflow Moisture Flood Sensor, 120dB Work Alone Battery Operated 3 packs From $8.95
5 options
Available in additional 5 optionsFrom$895
Topvico Water Alarms for Basements, Heater Leak Detector, Sump Pump Overflow Moisture Flood Sensor, 120dB Work Alone Battery Operated 3 packs
354.5 out of 5 Stars. 35 reviews
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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
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
654.4 out of 5 Stars. 65 reviews
Fosmon WaveLink 1x Add-On Wireless Motion Sensor Alarm Outdoor, Motion Detector Home Security System Alarm For Driveway, Indoor, Outdoor, No Receiver $13.99
$1399
current price $13.99Fosmon WaveLink 1x Add-On Wireless Motion Sensor Alarm Outdoor, Motion Detector Home Security System Alarm For Driveway, Indoor, Outdoor, No Receiver
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Graffiti WiFi Human Infrared Sensor Graffiti PIR Infrared Detector Phone WiFi Remote Control Sensor Smart Home Assistant Wifi PIR Motion Detector Was $11.99
Graffiti WiFi Human Infrared Sensor Graffiti PIR Infrared Detector Phone WiFi Remote Control Sensor Smart Home Assistant Wifi PIR Motion Detector
GJX Propane/Natural Gas Detector,Home Leak Alarm with Remote Control,Tester,Sensor,Sniffer,Combustible Level: Methane,Butane,LPG,LNG,Voice/Light Warning $15.81
$1581
current price $15.81GJX Propane/Natural Gas Detector,Home Leak Alarm with Remote Control,Tester,Sensor,Sniffer,Combustible Level: Methane,Butane,LPG,LNG,Voice/Light Warning
Cooper Lighting Motion Sensor Movement Detector - Multicolor $80.73
$8073
current price $80.73Cooper Lighting Motion Sensor Movement Detector - Multicolor
Wifi Natural Gas Sensor Tuya Smart Alarm Gas Leakage Detector Fire Security Digital LCD Temperature Display $21.78
$2178
current price $21.78Wifi Natural Gas Sensor Tuya Smart Alarm Gas Leakage Detector Fire Security Digital LCD Temperature Display
Wsdcam Window Alarm Ultra-Slim Glass Break Sensor 125dB Home Security Alarm System-4 Pack From $25.99
From$2599
Wsdcam Window Alarm Ultra-Slim Glass Break Sensor 125dB Home Security Alarm System-4 Pack
454.3 out of 5 Stars. 45 reviews
Tuya Smart Zigbee LCD Temperature and Humidity Sensor Wireless Detector Intelligent Linkage Support Home,1 x Temperature humidity sensor,White $12.69
$1269
current price $12.69Tuya Smart Zigbee LCD Temperature and Humidity Sensor Wireless Detector Intelligent Linkage Support Home,1 x Temperature humidity sensor,White
Aqara Zigbee Smart Door Window Sensor - Wireless Mini Contact Detector for Home Security, Compatible with Mijia Gateway, Apple HomeKit & Mijia App From $22.99
4 options
Available in additional 4 optionsFrom$2299
Aqara Zigbee Smart Door Window Sensor - Wireless Mini Contact Detector for Home Security, Compatible with Mijia Gateway, Apple HomeKit & Mijia App
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
114.4 out of 5 Stars. 11 reviews
Amerteer Smart WiFi Infrared Detectors Motion Sensor Alarm $16.57
$1657
current price $16.57Amerteer Smart WiFi Infrared Detectors Motion Sensor Alarm
15 out of 5 Stars. 1 reviews
Ludlz Infrared Beam Detector, 10m IR Beam Sensor Home Outdoor Security Alarm Human Body Detector Perimeter Protection
Ludlz Infrared Beam Detector, 10m IR Beam Sensor Home Outdoor Security Alarm Human Body Detector Perimeter Protection
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