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First Alert CO400 Battery-Powered Carbon Monoxide Detector First Alert CO400 Battery-Powered Carbon Monoxide Detector
Online
$12.93
Free shipping available on orders over $50

Free store pickup

as soon as 9/26
with

  • Electrochemical sensor
  • Adds security & safety
  • 1 button tests alarm functions
  • Online
    $12.93
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    Kidde Smoke and (CO) Carbon Monoxide Combo Alarm Kidde Smoke and (CO) Carbon Monoxide Combo Alarm
    Online
    $29.97
    List Price:$36.97
    You save: $7.00(19%)
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with
    Smoke/Carbon Monoxide Combo Alarm
    Online
    $29.97
    List Price:$36.97
    You save: $7.00(19%)
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with

    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%)
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with
  • AC-powered
  • Digital display
  • Test/Reset button
  • Online
    $29.38
    List Price:$44.97
    You save: $15.59(35%)
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with

    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
    Rollback
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Digital display illuminates hazard level
  • Easily plugs into any standard outlet
  • Battery backup
  • Online
    $30.21
    Was $42.74
    Rollback
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    First Alert CO605 Plug-In Carbon Monoxide Alarm with Battery Ba… First Alert CO605 Plug-In Carbon Monoxide Alarm with Battery Backup
    Online
    $24.99
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Electrochemical sensor for accuracy
  • Uses standard outlet
  • Battery backup
  • Online
    $24.99
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    Kidde (CO) Carbon Monoxide and Gas Alarm, AC/DC Kidde (CO) Carbon Monoxide and Gas Alarm, AC/DC
    Online
    $39.88
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with
  • Digital display
  • Test/reset button
  • Peak level memory
  • Online
    $39.88
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with

    Kidde Battery Powered CO Alarm with Digital Display Kidde Battery Powered CO Alarm with Digital Display
    Online
    $19.88
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with
  • Battery operated
  • Slide-out battery door cover
  • Low battery signal
  • Online
    $19.88
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with

    Kidde CO Alarm Kidde CO Alarm
    Online
    $17.87
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with
  • Battery operated (3 AA batteries included)
  • Low battery signal
  • Battery lockout system
  • Online
    $17.87
    Free shipping available on orders over $50
    Free store pickup
    as soon as today
    with

    First Alert GCO1CN Combination Explosive Gas and Carbon Monoxid… First Alert GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display
    Online
    $39.99
    List Price:$57.88
    You save: $17.89(31%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Detects natural, methane, propane gasses and carbon monoxide
  • Plugs in with battery operated backup
  • Online
    $39.99
    List Price:$57.88
    You save: $17.89(31%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    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%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Battery operated
  • Mute button
  • Voice alarm is easy to program
  • Online
    $27.99
    List Price:$38.97
    You save: $10.98(28%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    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
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • Easy to install
  • Features an 85-decibel alarm
  • Front-open compartment for easy battery changes
  • Online
    $149.00
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    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%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • 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%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    Kidde Radon Detection Kit Kidde Radon Detection Kit
    Online
    $13.19
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Professional analysis detects cancer-causing, colorless, tasteless radon gas seepage
  • Online
    $13.19
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    First Alert CO410 Battery Operated Carbon Monoxide Alarm with B… First Alert CO410 Battery Operated Carbon Monoxide Alarm with Backlit Digital Display
    Online
    $25.14
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Utilizes electrochemical sensor for increased security
  • Backlit digital display
  • Remote control mute feature
  • Online
    $25.14
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    Kidde Basic CO 9CO5LP Twin Kidde Basic CO 9CO5LP Twin
    Online
    $32.99
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Battery operated
  • Provides protection during power outage
  • Green alarm LED/Red power LED
  • Online
    $32.99
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    First Alert Battery Operated Smoke Alarm (Set of 2) First Alert Battery Operated Smoke Alarm (Set of 2)
    Online
    $15.11
    Was $20.85
    Reduced Price
    Sold & shipped by Build.com
    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. De…
    Online
    $15.11
    Was $20.85
    Reduced Price
    Sold & shipped by Build.com

    Kidde Basic 9CO5 Contractor's Pack, 6pc Kidde Basic 9CO5 Contractor's Pack, 6pc
    Online
    $93.99
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • Battery operated
  • Provides protection during power outage
  • Green alarm LED/Red power LED
  • Online
    $93.99
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    First Alert Hardwired Smoke Alarm with Battery Backup First Alert Hardwired Smoke Alarm with Battery Backup
    Online
    $15.65
    Was $21.60
    Reduced Price
    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
    Sold & shipped by Build.com

    First Alert COBATT-6 Carbon Monoxide Alarm, 6-piece First Alert COBATT-6 Carbon Monoxide Alarm, 6-piece
    Online
    $82.50
    Was $119.99
    Rollback
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • Specifically designed for residential and institutional applications
  • Includes 2 AA batteries
  • Easy to use
  • Online
    $82.50
    Was $119.99
    Rollback
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    Kidde Silhouette AC/DC (CO) Digital Carbon Monoxide Alarm Kidde Silhouette AC/DC (CO) Digital Carbon Monoxide Alarm
    Online
    $64.77
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    Kidde Silhouette AC/DC Digital Carbon Monoxide Alarm
    Online
    $64.77
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    Kidde AC Plug Carbon Monoxide Alarm Kidde AC Plug Carbon Monoxide Alarm
    Online
    $23.97
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Tests whether or not carbon monoxide is present
  • Tamper resistant
  • Easy installation
  • Online
    $23.97
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    First Alert CO400CN2 Battery Powered Carbon Monoxide Alarm, 2-P… First Alert CO400CN2 Battery Powered Carbon Monoxide Alarm, 2-Pack
    Online
    $35.69
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Sensor lasts up to 5 years
  • Powered by 2 AA batteries
  • Features a loud 85-decibel horn
  • Online
    $35.69
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    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
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Smoke/carbon monoxide alarm
  • Reduces false alarms
  • Easy to program
  • Online
    $39.99
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    First Alert SCO7CN Talking Combination Smoke and Carbon Monoxid… First Alert SCO7CN Talking Combination Smoke and Carbon Monoxide Alarm
    Online
    $229.00
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • 2 alarm systems to detect fire and CO
  • 85-decibel alarm
  • Side-access drawer for easy battery changes
  • Online
    $229.00
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    Pyle Pcmm05 Carbon Monoxide Meter Pyle Pcmm05 Carbon Monoxide Meter
    Online
    $100.96
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • Digital LCD display
  • Auto/manual zero
  • Fast sampling
  • Online
    $100.96
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    First Alert CO400 Basic Battery Operated Carbon Monoxide Alarm First Alert CO400 Basic Battery Operated Carbon Monoxide Alarm
    Online
    $899.00
    Was $999.00
    Rollback
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • Sensor lasts up to 5 years
  • Powered by 2 AA batteries
  • Features a loud 85-decibel horn
  • Online
    $899.00
    Was $999.00
    Rollback
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

    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
    $39.17
    List Price:$47.90
    You save: $8.73(18%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Photoelectric sensor reduces nuisance alarms
  • Battery operated and features an EZ access battery door
  • Online
    $39.17
    List Price:$47.90
    You save: $8.73(18%)
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    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
    $36.78
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

  • Nuisance-free technology
  • Voice and location feature
  • Power LED and alarm dictator
  • Online
    $36.78
    Free shipping available on orders over $50

    Free store pickup

    as soon as 9/26
    with

    First Alert Smoke Alarm with Photoelectric Sensor and Battery B… First Alert Smoke Alarm with Photoelectric Sensor and Battery Backup
    Online
    $25.46
    Was $35.13
    Reduced Price
    Sold & shipped by Build.com
    Features: -Product Type:Smoke Detector -Orientation:Wall/Ceiling Mounted -Power Source(s):9V Battery -Global Product Type:Smoke/Co Detectors-Smoke Detector -Mounting:Wall -Quantity:1 Each. Dimensions: -Overall Height - Top to Bottom:2.38 -Overall Product Weight:0.59 -Overall Width - Side to Side:5.1…
    Online
    $25.46
    Was $35.13
    Reduced Price
    Sold & shipped by Build.com

    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: -Product Type:Carbon Monoxide Detector -Orientation:Wall/Ceiling Mounted -Global Product Type:Smoke/Co Detectors-Carbon Monoxide Detector -Mounting:Wall -Quantity:1 Each. Dimensions: -Overall Product Weight:0.57 -Overall Width - Side to Side:5.53 -Overall Depth - Front to Back:5.72 Detecto…
    Online
    $44.78
    Was $61.80
    Reduced Price
    Sold & shipped by Build.com

    First Alert Battery Operated Smoke Alarm with Single Test Butto… First Alert Battery Operated Smoke Alarm with Single Test Button (Set of 2)
    Online
    $21.29
    Was $29.38
    Reduced Price
    Sold & shipped by Build.com
    Features: -Product Type:Smoke Detector -Orientation:Wall/Ceiling Mounted -Global Product Type:Smoke/Co Detectors-Smoke Detector -Mounting:Wall. Dimensions: -Overall Product Weight:1.75 -Overall Height - Top to Bottom:3.75 -Overall Width - Side to Side:6.63 -Overall Depth - Front to Back:6.63 Detecto…
    Online
    $21.29
    Was $29.38
    Reduced Price
    Sold & shipped by Build.com

    P3 Kill A Watt CO2 Wireless P3 Kill A Watt CO2 Wireless
    Online
    $79.95
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with

  • Includes P4255 Kill A Watt CO2 accessory sensor and P4225 display
  • Allows user to calculate the carbon footprint of appliances
  • Online
    $79.95
    Free Shipping available

    Free store pickup

    as soon as 9/26
    with



    Carbon Monoxide Detectors

    From carbon monoxide alarms and gas alarms to carbon monoxide detectors and fire extinguishers, the home security products you are looking for can be found at Walmart.

    We carry a wide selection of alerting devices, including smoke alarms, fire alarms and water alarms. Choose from First Alert smoke alarms and carbon monoxide alarms, Kidde smoke alarms and more. With many brands of carbon monoxide alarms available, Walmart has something for every home, and all at our Every Day Low Prices.

    Whether you’re looking for devices to detect and alert you to fires, smoke, gas and other hazards, we have got you covered. You’ll find brand name carbon monoxide meters, radon detection kits, smoke and fire detectors and explosive gas and carbon monoxide gas alarms to help you protect your home and family.

    It is easy to find home security products, including carbon monoxide detectors, at Walmart.com. You can filter your online search by brand, price, customer rating and special offers. Be sure to look for money-saving shipping offers and free store pickup for many products when you shop at Walmart.com.

    With carbon monoxide detectors from Walmart, you can help ensure that you and your family are protected. Save money. Live better.

    The Walmart.com site includes Flash technology. To avoid interruption of software designed to aid visually-impaired people, please turn off your Flash player.
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