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Safety Equipment and GearAlarm SystemsAll Home SecurityBathroom PlumbingBLACK+DECKERCarbon Monoxide AlarmsDimmers, Switches, and Wall PlatesDoor HardwareDoor Security HardwareDoorbellsElectrical ToolsEmergency SuppliesEmersonFire SafetyFirst AlertFurniture HardwareGarage Door Openers and HardwareGate HardwareGatesGuttering & DrainageHand ToolsHome SafetyHome Safety by BrandHVAC Ducting and VentilationKiddeLight BulbsMailboxes and Mailbox AccessoriesOutletsPersonal PreparednessPersonal SafetySafety DetectorsShop Plumbing by FixtureStorm & Flood PrepSurveillanceThermostatsTool Equipment & StorageUniversal Security InstrumentsWater Heaters, Pumps & TanksWildfire Prep
Detectors(1000+)
Uses item details. Price when purchased online
SITERWELL Hardwired Smoke & Carbon Monoxide Detector Combo,10 Year Battery,UL217-9th,Interconnected,Bilingual Voice Alerts,6.1in*1.65in.3 pack From $51.90
Sponsored
From$5190
SITERWELL Hardwired Smoke & Carbon Monoxide Detector Combo,10 Year Battery,UL217-9th,Interconnected,Bilingual Voice Alerts,6.1in*1.65in.3 pack
55 out of 5 Stars. 5 reviews
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SITERWELL Hardwired Interconnected Smoke and Carbon Monoxide Detector, 10 Year Product Life Alarm Smoke Carbon Monoxide Detector with 2 AA Batteries Back Up, Smoke and CO Detector Voice Alert,1 Pack From $54.99
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From$5499
SITERWELL Hardwired Interconnected Smoke and Carbon Monoxide Detector, 10 Year Product Life Alarm Smoke Carbon Monoxide Detector with 2 AA Batteries Back Up, Smoke and CO Detector Voice Alert,1 Pack
224.2 out of 5 Stars. 22 reviews
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SITERWELL Smoke Detector, 10 Year Battery,Photoelectric Sensor, Fire Alarm,Low Battery,12 Packs From $23.68
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From$2368
SITERWELL Smoke Detector, 10 Year Battery,Photoelectric Sensor, Fire Alarm,Low Battery,12 Packs
1924.4 out of 5 Stars. 192 reviews
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X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Battery, Standalone Alarm, Certified to Latest UL Standards, 5 PACK, SC06 From $43.19
Sponsored
From$4319
X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Battery, Standalone Alarm, Certified to Latest UL Standards, 5 PACK, SC06
6064.6 out of 5 Stars. 606 reviews
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LCD Display CO Carbon Monoxide Gas Detector Device Home Safety Alarm Detector From $13.99
From$1399
LCD Display CO Carbon Monoxide Gas Detector Device Home Safety Alarm Detector
344.7 out of 5 Stars. 34 reviews
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Kidde 10-Year Sealed Lithium Battery-Operated Photoelectric Smoke Detector Alarm, 5-inch From $32.47
2 options
Available in additional 2 optionsFrom$3247
Kidde 10-Year Sealed Lithium Battery-Operated Photoelectric Smoke Detector Alarm, 5-inch
3694.1 out of 5 Stars. 369 reviews
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100+ bought since yesterday Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 4-Inch, Batteries Included From $19.88
2 options
Available in additional 2 optionsFrom$1988
Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 4-Inch, Batteries Included
7994.5 out of 5 Stars. 799 reviews
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100+ bought since yesterday Kidde Battery-Operated 4-inch Smoke Detector & Carbon Monoxide Value Pack, Batteries Included From $38.97
3 options
Available in additional 3 optionsFrom$3897
Kidde Battery-Operated 4-inch Smoke Detector & Carbon Monoxide Value Pack, Batteries Included
7574.5 out of 5 Stars. 757 reviews
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Overall pick Kidde AA Battery Operated Basic Carbon Monoxide Alarm - 9CO5-LP3 $23.44
$2344
current price $23.44Kidde AA Battery Operated Basic Carbon Monoxide Alarm - 9CO5-LP3
5534.6 out of 5 Stars. 553 reviews
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50+ bought since yesterday First Alert SMI100 Battery-Operated Smoke Alarm, 1046827PT $16.99 $28.80/ea
$1699
current price $16.99$28.80/ea
First Alert SMI100 Battery-Operated Smoke Alarm, 1046827PT
1514.6 out of 5 Stars. 151 reviews
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(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
1204.2 out of 5 Stars. 120 reviews
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X-Sense Smoke Detector Carbon Monoxide Detector Combo 10 Year with Display, Standalone Model SC01 Smoke Alarm, 3 Pack From $37.99
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From$3799
X-Sense Smoke Detector Carbon Monoxide Detector Combo 10 Year with Display, Standalone Model SC01 Smoke Alarm, 3 Pack
6304.5 out of 5 Stars. 630 reviews
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SITERWELL Smoke Detector, 10 Year Battery ,Photoelectric Sensor, Fire Alarm,Low Battery and Fault Warning for House and Bedroom, UL217-9th Listed, GS525A, 1 Packs From $23.68
8 options
Available in additional 8 optionsFrom$2368
SITERWELL Smoke Detector, 10 Year Battery ,Photoelectric Sensor, Fire Alarm,Low Battery and Fault Warning for House and Bedroom, UL217-9th Listed, GS525A, 1 Packs
1924.4 out of 5 Stars. 192 reviews
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X-Sense Smoke Detector Carbon Monoxide Detector Combo 10 Year with Display, Standalone Model SC01 Smoke Alarm From $37.99
2 options
Available in additional 2 optionsFrom$3799
X-Sense Smoke Detector Carbon Monoxide Detector Combo 10 Year with Display, Standalone Model SC01 Smoke Alarm
6304.5 out of 5 Stars. 630 reviews
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Best seller X-Sense Wireless Smoke Detector Carbon Monoxide Detector Combo 10 Year Battery Alarm With Display, Over 820 ft Transmission Range, SC07-W, 1-Pack From $35.99
2 options
Available in additional 2 optionsFrom$3599
X-Sense Wireless Smoke Detector Carbon Monoxide Detector Combo 10 Year Battery Alarm With Display, Over 820 ft Transmission Range, SC07-W, 1-Pack
3054.6 out of 5 Stars. 305 reviews
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100+ bought since yesterday Kidde AC Plug-In Carbon Monoxide Detector with Battery Backup, CO Alarm with LED Light Indicators From $27.47
3 options
Available in additional 3 optionsFrom$2747
Kidde AC Plug-In Carbon Monoxide Detector with Battery Backup, CO Alarm with LED Light Indicators
18034.7 out of 5 Stars. 1803 reviews
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Smoke Alarm Home Security System Fire Protection Smoke Alarm Detector From $12.99
From$1299
Smoke Alarm Home Security System Fire Protection Smoke Alarm Detector
314.3 out of 5 Stars. 31 reviews
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Universal Security Instruments Inc Sensing Plus, Smoke and Fire Alarm, Multi-Criteria Detection, with 10 Year Sealed Battery $27.97
$2797
current price $27.97Universal Security Instruments Inc Sensing Plus, Smoke and Fire Alarm, Multi-Criteria Detection, with 10 Year Sealed Battery
1554.5 out of 5 Stars. 155 reviews
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50+ bought since yesterday Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 4-inch, Batteries Included, 2 Pack From $36.88
2 options
Available in additional 2 optionsFrom$3688
Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 4-inch, Batteries Included, 2 Pack
2734.5 out of 5 Stars. 273 reviews
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SITERWELL Smoke Detector, Magnetic Fastening Kit, Smoke Alarm, Photoelectric ,Low Battery Warning Function, 1 Pack From $19.12
9 options
Available in additional 9 optionsFrom$1912
SITERWELL Smoke Detector, Magnetic Fastening Kit, Smoke Alarm, Photoelectric ,Low Battery Warning Function, 1 Pack
5484.4 out of 5 Stars. 548 reviews
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SITERWELL Portable Plug in Carbon Monoxide (CO)Detector 10 Year Battery,Electrochemical,Sound Warning, AC Powered for Home Office Travel,1 pack From $28.99
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From$2899
SITERWELL Portable Plug in Carbon Monoxide (CO)Detector 10 Year Battery,Electrochemical,Sound Warning, AC Powered for Home Office Travel,1 pack
484.5 out of 5 Stars. 48 reviews
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Zuomeng High Water Alarm for Sump Pump, Flashing Light & 110 dB Alarm, IP67 Casing, Connects to Submersible Pump $75.99
Sponsored
$7599
current price $75.99Zuomeng High Water Alarm for Sump Pump, Flashing Light & 110 dB Alarm, IP67 Casing, Connects to Submersible Pump
X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Battery, Standalone Alarm, Certified to Latest UL Standards, 1 PACK, SC06 From $43.19
2 options
Available in additional 2 optionsFrom$4319
X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Battery, Standalone Alarm, Certified to Latest UL Standards, 1 PACK, SC06
6064.6 out of 5 Stars. 606 reviews
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4 Pack Smoke Detector Home Security Sensor Alert Alarm From $31.99
From$3199
4 Pack Smoke Detector Home Security Sensor Alert Alarm
84.1 out of 5 Stars. 8 reviews
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First Alert BRK SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup $19.67
$1967
current price $19.67First Alert BRK SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup
664.7 out of 5 Stars. 66 reviews
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Outdoor-Forest Brand, Carbon Monoxide Detector, Orange Color, LCD Screen $28.96
$2896
current price $28.96Outdoor-Forest Brand, Carbon Monoxide Detector, Orange Color, LCD Screen
1254.5 out of 5 Stars. 125 reviews
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Siterwell AA Battery Operated Carbon Monoxide Detector Alarm, LCD Display,Portable for Travel Home,1-pack From $25.78
3 options
Available in additional 3 optionsFrom$2578
Siterwell AA Battery Operated Carbon Monoxide Detector Alarm, LCD Display,Portable for Travel Home,1-pack
1344.6 out of 5 Stars. 134 reviews
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Kidde Hardwired Photoelectric Smoke Detector Alarm, 10-Year Lithium Sealed Battery Backup From $35.97
2 options
Available in additional 2 optionsFrom$3597
Kidde Hardwired Photoelectric Smoke Detector Alarm, 10-Year Lithium Sealed Battery Backup
2333.7 out of 5 Stars. 233 reviews
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SITERWELL Smoke Detector 10 Year Battery Operated,Photoelectric,Rlectrochemical Sensors, Fire Alarm,Bilingual Voice Alerts, UL217-9th Standards,1 Pack From $24.80
3 options
Available in additional 3 optionsFrom$2480
SITERWELL Smoke Detector 10 Year Battery Operated,Photoelectric,Rlectrochemical Sensors, Fire Alarm,Bilingual Voice Alerts, UL217-9th Standards,1 Pack
164.8 out of 5 Stars. 16 reviews
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First Alert 1046856, 10 Year Battery Ionization Smoke Alarm $24.47
$2447
current price $24.47First Alert 1046856, 10 Year Battery Ionization Smoke Alarm
664.5 out of 5 Stars. 66 reviews
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X-Sense Smoke and Carbon Monoxide Alarm Combo, 10 Year Battery, Wireless Interconnected Smoke Detector, Connects Up to 24 Link+ Alarms, 6 Pack, SC01-W From $39.99
Sponsored
From$3999
X-Sense Smoke and Carbon Monoxide Alarm Combo, 10 Year Battery, Wireless Interconnected Smoke Detector, Connects Up to 24 Link+ Alarms, 6 Pack, SC01-W
434.4 out of 5 Stars. 43 reviews
TOPTES Carbon Monoxide Detector CT-300, Handheld CO Alarm with Backlit LCD Display and Audible Visual Alerts, for Home, Car, Camping and Travel $45.99
Sponsored
$4599
current price $45.99TOPTES Carbon Monoxide Detector CT-300, Handheld CO Alarm with Backlit LCD Display and Audible Visual Alerts, for Home, Car, Camping and Travel
234.5 out of 5 Stars. 23 reviews
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Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-COPP-B-LPM From $27.94
3 options
Available in additional 3 optionsFrom$2794
Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-COPP-B-LPM
7474.6 out of 5 Stars. 747 reviews
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Kidde Hardwired Photoelectric Smoke Detector Alarm, AA Battery Backup, 5-inch From $34.84
2 options
Available in additional 2 optionsFrom$3484
Kidde Hardwired Photoelectric Smoke Detector Alarm, AA Battery Backup, 5-inch
1623.8 out of 5 Stars. 162 reviews
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Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 5-inch, Batteries Included From $29.97
2 options
Available in additional 2 optionsFrom$2997
Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 5-inch, Batteries Included
1254.5 out of 5 Stars. 125 reviews
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First Alert 1046834, Electric Precision Detection Smoke Alarms $24.84
$2484
current price $24.84First Alert 1046834, Electric Precision Detection Smoke Alarms
1074.5 out of 5 Stars. 107 reviews
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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 Was $35.99
2 options
Available in additional 2 optionsGasKnight 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
564.7 out of 5 Stars. 56 reviews
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Kidde 10-Year Sealed Lithium Battery-Operated Photoelectric Smoke Detector Alarm, 5-Inch, 2 Pack From $65.00
2 options
Available in additional 2 optionsFrom$6500
Kidde 10-Year Sealed Lithium Battery-Operated Photoelectric Smoke Detector Alarm, 5-Inch, 2 Pack
1483.6 out of 5 Stars. 148 reviews
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SITERWELL Hardwired Interconnected Smoke Detector, Photoelectric Smoke Alarm with 9V Backup Battery, Fire Alarm with Test/Silence Button, ETL Listed, GS562A, 1 Pack From $26.21
9 options
Available in additional 9 optionsFrom$2621
SITERWELL Hardwired Interconnected Smoke Detector, Photoelectric Smoke Alarm with 9V Backup Battery, Fire Alarm with Test/Silence Button, ETL Listed, GS562A, 1 Pack
1344.4 out of 5 Stars. 134 reviews
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X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Sensor with Digital Display, Standalone Alarm, Certified to Latest UL Standards, SC01, 1-PACK From $39.99
2 options
Available in additional 2 optionsFrom$3999
X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Sensor with Digital Display, Standalone Alarm, Certified to Latest UL Standards, SC01, 1-PACK
434.4 out of 5 Stars. 43 reviews
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First Alert SMICO100 Battery-Operated 2-in-1 Smoke and CO Alarm, Ionization $39.99
$3999
current price $39.99First Alert SMICO100 Battery-Operated 2-in-1 Smoke and CO Alarm, Ionization
674.2 out of 5 Stars. 67 reviews
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First Alert SMICO100-AC Interconnect Hardwire 2-in-1 Smoke and CO Alarm with Battery Backup, Ionization $49.81
$4981
current price $49.81First Alert SMICO100-AC Interconnect Hardwire 2-in-1 Smoke and CO Alarm with Battery Backup, Ionization
1244.2 out of 5 Stars. 124 reviews
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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
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
2804.4 out of 5 Stars. 280 reviews
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Knox Safety Plugin Carbon Monoxide Detector, Voice Alert & LCD Display, 10-Year Battery Backup From $51.00
3 options
Available in additional 3 optionsFrom$5100
Knox Safety Plugin Carbon Monoxide Detector, Voice Alert & LCD Display, 10-Year Battery Backup
1914 out of 5 Stars. 191 reviews
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Clearance Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety $16.99 Was $29.99
Now$1699
current price Now $16.99, Was $29.99$29.99
Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety
724.2 out of 5 Stars. 72 reviews
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Rely Essentials 5400 Smoke Alarm Hardwired AC Powered with Battery Backup - Photoelectric Smoke Detector - Interconnect, Easy Install 1 Pack $29.99
$2999
current price $29.99Rely Essentials 5400 Smoke Alarm Hardwired AC Powered with Battery Backup - Photoelectric Smoke Detector - Interconnect, Easy Install 1 Pack
124.8 out of 5 Stars. 12 reviews
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Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 5-inch, Batteries Included, 2 Pack From $57.00
2 options
Available in additional 2 optionsFrom$5700
Kidde Battery-Operated Photoelectric Smoke Detector Alarm, 5-inch, Batteries Included, 2 Pack
724.6 out of 5 Stars. 72 reviews
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Kidde 10-Year Battery Smoke Detector, Voice Alerts & LED Warning Lights $46.74
$4674
current price $46.74Kidde 10-Year Battery Smoke Detector, Voice Alerts & LED Warning Lights
154.4 out of 5 Stars. 15 reviews
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First Alert Voice Alert Hard-Wired Photoelectric Smoke Detector $34.90
$3490
current price $34.90First Alert Voice Alert Hard-Wired Photoelectric Smoke Detector
234.5 out of 5 Stars. 23 reviews
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