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First Alert GCO1CN Combination Explosive Gas and Carbon Monoxid… First Alert GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display
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$38.08
List Price:$57.88
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  • Detects natural, methane, propane gasses and carbon monoxide
  • Plugs in with battery operated backup
  • Online
    $38.08
    List Price:$57.88
    You save: $19.80(34%)
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    First Alert CO400 Battery-Powered Carbon Monoxide Detector First Alert CO400 Battery-Powered Carbon Monoxide Detector
    Online
    $18.47
    (69)
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  • Electrochemical sensor
  • Adds security & safety
  • 1 button tests alarm functions
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    $18.47
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    First Alert CO615 Plug-In With Battery Backup Carbon Monoxide D… First Alert CO615 Plug-In With Battery Backup Carbon Monoxide Detector With Digital Display
    Online
    $30.21
    Was $42.74
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    (67)
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  • Digital display illuminates hazard level
  • Easily plugs into any standard outlet
  • Battery backup
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    $30.21
    Was $42.74
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    First Alert CO410 Battery Operated Carbon Monoxide Alarm with B… First Alert CO410 Battery Operated Carbon Monoxide Alarm with Backlit Digital Display
    Online
    $24.99
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  • Utilizes electrochemical sensor for increased security
  • Backlit digital display
  • Remote control mute feature
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    $24.99
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    First Alert SCO7CN Battery Operated Combination Smoke and Carbo… First Alert SCO7CN Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location
    Online
    $27.99
    List Price:$38.97
    You save: $10.98(28%)
    (16)
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  • Battery operated
  • Mute button
  • Voice alarm is easy to program
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    $27.99
    List Price:$38.97
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    Kidde Smoke and (CO) Carbon Monoxide Combo Alarm Kidde Smoke and (CO) Carbon Monoxide Combo Alarm
    Online
    $31.68
    List Price:$36.97
    You save: $5.29(14%)
    (68)
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    Smoke/Carbon Monoxide Combo Alarm
    Online
    $31.68
    List Price:$36.97
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    Kidde Silhouette AC/DC (CO) Digital Carbon Monoxide Alarm Kidde Silhouette AC/DC (CO) Digital Carbon Monoxide Alarm
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    $68.00
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    Kidde Silhouette AC/DC Digital Carbon Monoxide Alarm
    Online
    $68.00
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    First Alert SCO403 Carbon Monoxide and Smoke Detector, Combo Pa… First Alert SCO403 Carbon Monoxide and Smoke Detector, Combo Pack
    Online
    $22.97
    List Price:$27.77
    You save: $4.80(17%)
    (36)
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  • 2-pack includes smoke and CO alarms
  • Attractive design
  • UL listed for safety
  • Online
    $22.97
    List Price:$27.77
    You save: $4.80(17%)
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    Kidde AC/DC Carbon Monoxide Alarm Kidde AC/DC Carbon Monoxide Alarm
    Online
    $22.21
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  • Tests whether or not carbon monoxide is present
  • Tamper resistant
  • Easy installation
  • Online
    $22.21
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    First Alert SCO7CN Talking Combination Smoke and Carbon Monoxid… First Alert SCO7CN Talking Combination Smoke and Carbon Monoxide Alarm
    Online
    $229.00
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  • 2 alarm systems to detect fire and CO
  • 85-decibel alarm
  • Side-access drawer for easy battery changes
  • Online
    $229.00
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    First Alert CO605-8CSD-8 Carbon Monoxide Plug-In Alarm with Bat… First Alert CO605-8CSD-8 Carbon Monoxide Plug-In Alarm with Battery Backup, 8-Pack Shelf Display
    Online
    $149.00
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  • Easy to install
  • Features an 85-decibel alarm
  • Front-open compartment for easy battery changes
  • Online
    $149.00
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    First Alert CO400CN2 Battery Powered Carbon Monoxide Alarm, 2-P… First Alert CO400CN2 Battery Powered Carbon Monoxide Alarm, 2-Pack
    Online
    $38.22
    (10)
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  • Sensor lasts up to 5 years
  • Powered by 2 AA batteries
  • Features a loud 85-decibel horn
  • Online
    $38.22
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    Kidde NightHawk AC/DC Digital CO/Carbon Monoxide Alarm Kidde NightHawk AC/DC Digital CO/Carbon Monoxide Alarm
    Online
    $29.38
    List Price:$44.97
    You save: $15.59(35%)
    (31)
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  • AC-powered
  • Digital display
  • Test/Reset button
  • Online
    $29.38
    List Price:$44.97
    You save: $15.59(35%)
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    First Alert CO400 Basic Battery Operated Carbon Monoxide Alarm First Alert CO400 Basic Battery Operated Carbon Monoxide Alarm
    Online
    $929.98
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  • Sensor lasts up to 5 years
  • Powered by 2 AA batteries
  • Features a loud 85-decibel horn
  • Online
    $929.98
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    Kidde Basic 9CO5 Contractor's Pack, 6pc Kidde Basic 9CO5 Contractor's Pack, 6pc
    Online
    $93.99
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  • Battery operated
  • Provides protection during power outage
  • Green alarm LED/Red power LED
  • Online
    $93.99
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    Kidde CO Alarm Kidde CO Alarm
    Online
    $20.22
    (14)
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  • Battery operated
  • Slide-out battery door cover
  • Low battery signal
  • Online
    $20.22
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    First Alert COBATT-6 Carbon Monoxide Alarm, 6-piece First Alert COBATT-6 Carbon Monoxide Alarm, 6-piece
    Online
    $119.99
    (3)
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  • Specifically designed for residential and institutional applications
  • Includes 2 AA batteries
  • Easy to use
  • Online
    $119.99
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    First Alert SCO7CN-C2 Battery Operated Combination Smoke and Ca… First Alert SCO7CN-C2 Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location, 2-Pack
    Online
    $61.40
    (1)
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  • Smoke/carbon monoxide alarm
  • Reduces false alarms
  • Easy to program
  • Online
    $61.40
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    First Alert SCO7CN-C Child Awakening Combo Smoke & CO Alarm wit… First Alert SCO7CN-C Child Awakening Combo Smoke & CO Alarm with Voice Location Feature
    Online
    $39.99
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  • Smoke/carbon monoxide alarm
  • Reduces false alarms
  • Easy to program
  • Online
    $39.99
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    Kidde Radon Detection Kit Kidde Radon Detection Kit
    Online
    $14.20
    (1)
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  • Professional analysis detects cancer-causing, colorless, tasteless radon gas seepage
  • Online
    $14.20
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    Pyle Pcmm05 Carbon Monoxide Meter Pyle Pcmm05 Carbon Monoxide Meter
    Online
    $100.96
    Free Shipping available

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    as soon as 7/18
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  • Digital LCD display
  • Auto/manual zero
  • Fast sampling
  • Online
    $100.96
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    Kidde CO Alarm Kidde CO Alarm
    Online
    $17.87
    (10)
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  • Battery operated (3 AA batteries included)
  • Low battery signal
  • Battery lockout system
  • Online
    $17.87
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    Gastec Monoxide Diosimeter Gas Detector Tube (10 Per Box) Gastec Monoxide Diosimeter Gas Detector Tube (10 Per Box)
    Online
    $103.84
    Sold & shipped by Wayfair
    Features: -.-UNSPC CODE: 41104100.-Sampling Tubes & Pumps Sampling Tubes Pumps monitors calibration equipment tube pump.-TUBES DOSI CO-LR.
    Online
    $103.84
    Sold & shipped by Wayfair

    First Alert- brk - SC9120B 120 Volt Combination Smoke & Carbon … First Alert- brk - SC9120B 120 Volt Combination Smoke & Carbon Monoxide Alarm With
    Online
    $54.68
    Was $61.43
    Reduced Price
    (1)
    Sold & shipped by UnbeatableSale.com
    Smoke and carbon monoxide alarm,
    Online
    $54.68
    Was $61.43
    Reduced Price
    Sold & shipped by UnbeatableSale.com

    First Alert Multiple Station Smoke Alarm First Alert Multiple Station Smoke Alarm
    Online
    $12.56
    Was $17.33
    Reduced Price
    Sold & shipped by Build.com
    Features: -Multiple station smoke alarm.-Redesigned cover, metal sensing chamber and new integrated circuit work together to reduce nuisance alarms.-Perfect mount system features a gasket less base and mounting bracket that keeps the alarm secure over a wide rotation range to allow for true alignmen…
    Online
    $12.56
    Was $17.33
    Reduced Price
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    First Alert Battery Operated Smoke Alarm with Single Test Butto… First Alert Battery Operated Smoke Alarm with Single Test Button (Set of 2)
    Online
    $28.64
    Sold & shipped by Wayfair
    Features: -Set of 2 smoke alarms.-New enhanced smoke gathering design.-Ionization technology.-Blinking power indicator.-Single test button to run complete system diagnostics.-Slide out battery drawer for easy battery placement.-General use. Warranty: -Manufacturer provides 1 year warranty. Detector…
    Online
    $28.64
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    Kidde 10-year Battery Carbon Monoxide Alarm Kidde 10-year Battery Carbon Monoxide Alarm

    In stores only

  • Sealed 10 year battery
  • 10 year warranty
  • 85-decibel alarm
  • In stores only

    Kidde Smoke and (CO) Carbon Monoxide Alarm Value Pack Kidde Smoke and (CO) Carbon Monoxide Alarm Value Pack

    In stores only

    (2)
  • Value pack includes smoke and CO alarms
  • Easy installation
  • Batteries included
  • In stores only

    First Alert Smoke Alarm with Photoelectric Sensor and Battery B… First Alert Smoke Alarm with Photoelectric Sensor and Battery Backup
    Online
    $25.77
    (1)
    Sold & shipped by Wayfair
    Features: -Smoke alarm.-Photoelectric sensor and battery backup.-Convenient silence / test button.-Dust cover.-85 Decibel alarm.-Alarm indicator identifies which unit triggered alarm.-Inter-connectable with BRK and hardwired smoke and carbon monoxide alarms.-Very effective at detecting smoldering fi…
    Online
    $25.77
    Sold & shipped by Wayfair

    Defibtech Wall-Mount Case, Alarmed, 18 X 18 X 4 Defibtech Wall-Mount Case, Alarmed, 18 X 18 X 4
    Online
    $273.80
    Sold & shipped by Wayfair
    Features: -For device type: Defibrillator.-Material: Metal.-Made in USA. Color/Finish: -Color: White. Dimensions: -18'' H x 18'' W x 4'' D, 16 lbs. This cabinet allows a Lifeline AED to be mounted on a wall (hardware not included) to increase visibility and to protect the AED from theft. or damage. …
    Online
    $273.80
    Sold & shipped by Wayfair

    First Alert Battery Operated Smoke Alarm (Set of 2) First Alert Battery Operated Smoke Alarm (Set of 2)
    Online
    $19.41
    (1)
    Sold & shipped by Wayfair
    Features: -Set of 2 smoke alarms.-Ionization smoke sensing technology with wide openings for smoke entry.-Convenient test button.-Low battery signal.-85 Decibel horn.-Easy to install. Includes: -Includes 9 volt battery. Specifications: -120 Volts. Warranty: -Manufacturer provides 1 year warranty. D…
    Online
    $19.41
    Sold & shipped by Wayfair

    Kidde 10-year Battery Digital Carbon Monoxide Alarm Kidde 10-year Battery Digital Carbon Monoxide Alarm

    In stores only

  • Test-reset button
  • 10-year warranty on alarm
  • 85-decibel Alarm
  • In stores only

    First Alert OLCOV SmartBridge Battery Operated Wireless Carbon … First Alert OLCOV SmartBridge Battery Operated Wireless Carbon Monoxide Detector with Voice Alarm and Interconnection Capability
    Online
    $44.97
    List Price:$47.90
    You save: $2.93(6%)
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    Free store pickup

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    with

  • Photoelectric sensor reduces nuisance alarms
  • Battery operated and features an EZ access battery door
  • Online
    $44.97
    List Price:$47.90
    You save: $2.93(6%)
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    First Alert OLCOMBOV SmartBridge Battery Operated Combination S… First Alert OLCOMBOV SmartBridge Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Alert and Photoelectric Detector
    Online
    $46.53
    List Price:$49.97
    You save: $3.44(7%)
    (1)
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    as soon as 7/18
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  • Photoelectric sensor reduces nuisance alarms
  • Battery operated and features an EZ access battery door
  • Online
    $46.53
    List Price:$49.97
    You save: $3.44(7%)
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    First Alert AC Powered Carbon Monoxide Alarm First Alert AC Powered Carbon Monoxide Alarm
    Online
    $44.78
    Was $61.80
    Reduced Price
    Sold & shipped by Build.com
    Features: -Carbon monoxide alarm.-Back up battery.-Can be interconnected with up to 11 additional smoke or carbon monoxide alarms.-Ideal for bedroom, hall, or basement.-Intelligent sensor reduces nuisance alarms.-2 Silence features low battery for up to 8 hours and nuisance alarms for up to 6 minute…
    Online
    $44.78
    Was $61.80
    Reduced Price
    Sold & shipped by Build.com

    Kidde Worry-Free 10-Year Kitchen Smoke and Carbon Monoxide Alar… Kidde Worry-Free 10-Year Kitchen Smoke and Carbon Monoxide Alarm

    In stores only

  • Combination smoke and carbon monoxide alarm
  • Sealed-in lithium battery
  • Photoelectric sensor
  • In stores only

    P3 Kill A Watt CO2 Accessory Sensor P3 Kill A Watt CO2 Accessory Sensor
    Online
    $39.95
    Free shipping available on orders over $50

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  • Compatible with P4250 Kill A Watt CO2 wireless and P4200
  • Can use up to 8 sensors simultaneously to measure multiple devices
  • Online
    $39.95
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    First Alert Pc900v 2-In-1 Smoke and Carbon Monoxide Alarm with … First Alert Pc900v 2-In-1 Smoke and Carbon Monoxide Alarm with Voice
    Online
    $47.99
    Free shipping available on orders over $50

    Free store pickup

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    with

  • Nuisance-free technology
  • Voice and location feature
  • Power LED and alarm dictator
  • Online
    $47.99
    Free shipping available on orders over $50

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    First Alert Hardwired Smoke Alarm with Battery Backup First Alert Hardwired Smoke Alarm with Battery Backup
    Online
    $15.65
    Was $21.60
    Reduced Price
    (1)
    Sold & shipped by Build.com
    Features: -Smoke alarm.-Single button for testing and silencing.-Smoke detection technologies.-Latching alarm indicator, identifies which unit initiated an alarm.-Perfect mount allows for easy installation. Construction: -Meets new construction requirements. Specifications: -9 Volt battery back up.-…
    Online
    $15.65
    Was $21.60
    Reduced Price
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    Items 1-39 of 39 total
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    Carbon Monoxide Alarms

    Your home can be safer when you can shop at Walmart.com for carbon monoxide alarms at Every Day Low Prices. Our selection features AC and battery-powered carbon monoxide alarms from First Alert and Kidde. Some combination carbon monoxide sensors can also detect smoke or other explosive gases, such as natural, methane or propane gases.

    In addition to CO detectors, we offer a wide variety of other home security products, such as door security products, fire safety items, home safes and lockboxes and home surveillance equipment. It's easy to browse for CO sensors, home security and home safety products at Walmart.com by price order, customer rating or best sellers, too.

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    You can take advantage of money-saving shipping offers on CO detectors and more products throughout the Home Improvement section of Walmart.com. Shop for carbon monoxide alarms and more home safety products at Every Day Low Prices from Walmart.com to save money and live better.