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10 bestMax Carbon Monoxide Detectorsof November 2025

112M consumers helped this year.

1

First Alert CO605A Carbon Monoxide Plug-In Alarm with Battery Backup

First Alert CO605A Carbon Monoxide Plug-In Alarm with Battery Backup

First Alert CO605A Carbon Monoxide Plug-In Alarm with Battery Backup

First Alert

9.8

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2

DYWL SECURITY Carbon Monoxide Detectors Portable Carbon Monoxide Detector for Travel Carbon Monoxide Detector Plug in Wall with LED Digital Display Voice Light Plug and Play - 2Pack

DYWL SECURITY Carbon Monoxide Detectors Portable Carbon Monoxide Detector for Travel Carbon Monoxide Detector Plug in Wall with LED Digital Display Voice Light Plug and Play - 2Pack

DYWL SECURITY Carbon Monoxide Detectors Portable Carbon Monoxide Detector for Travel Carbon Monoxide Detector Plug in Wall with LED Digital Display Voice Light Plug and Play - 2Pack

DYWL SECURITY

9.6

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3

First Alert SC9120BA Hardwire Combination Carbon Monoxide and Smoke Alarm

First Alert SC9120BA Hardwire Combination Carbon Monoxide and Smoke Alarm

First Alert SC9120BA Hardwire Combination Carbon Monoxide and Smoke Alarm

First Alert

9.4

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4

Kidde 900-0263CO-CA Plug-in Carbon Monoxide Alarm (KN-COB-DP2CA), White, 1 Units

Kidde 900-0263CO-CA Plug-in Carbon Monoxide Alarm (KN-COB-DP2CA), White, 1 Units

Kidde 900-0263CO-CA Plug-in Carbon Monoxide Alarm (KN-COB-DP2CA), White, 1 Units

Kidde

9.1

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12% off

5

First Alert CO400A Battery Powered Carbon Monoxide Alarm

First Alert CO400A Battery Powered Carbon Monoxide Alarm

First Alert CO400A Battery Powered Carbon Monoxide Alarm

First Alert

8.9

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OtherRelated productsUp to 20% off

Carbon Monoxide Alarm, Digital Display CO Detector Security CO Monoxide for Home Kitchen Bedroom Safety Battery Powered (Battery not Included),Comply with CSA 6.19 (2 PACK)

Carbon Monoxide Alarm, Digital Display CO Detector Security CO Monoxide for Home Kitchen Bedroom Safety Battery Powered (Battery not Included),Comply with CSA 6.19 (2 PACK)

Plug in Carbon Monoxide Detector & Natural Gas Combination Detectors 4in1 CO Gas Temp Humidity Monitor with 2.1'' HD Screen & Indicator CO, Propane, Methane Explosive Gas Alarm

Plug in Carbon Monoxide Detector & Natural Gas Combination Detectors 4in1 CO Gas Temp Humidity Monitor with 2.1'' HD Screen & Indicator CO, Propane, Methane Explosive Gas Alarm

Kidde Battery-Operated Carbon Monoxide Alarm with Digital Dis

Kidde Battery-Operated Carbon Monoxide Alarm with Digital Dis

Carbon Monoxide Detector Portable CO Alarm [3 in 1] CO & Temperature & Air Humidity Meter with LCD Display and Buit-in 1000mAh Lithium Battery for Home & Outdoor Use UL2034

Carbon Monoxide Detector Portable CO Alarm [3 in 1] CO & Temperature & Air Humidity Meter with LCD Display and Buit-in 1000mAh Lithium Battery for Home & Outdoor Use UL2034

6

TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange

TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange

TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange

TOPTES

8.6

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26% off

7

First Alert Battery Operated Carbon Monoxide Alarm with Digital Display

First Alert Battery Operated Carbon Monoxide Alarm with Digital Display

First Alert Battery Operated Carbon Monoxide Alarm with Digital Display

sufe

8.3

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8

Plug in Carbon Monoxide Detector 3in1 CO Temperature Humidity Monitor with 2.1'' HD Screen & Indicator Visual&Audible Alarm for Home Travel Hotel RV

Plug in Carbon Monoxide Detector 3in1 CO Temperature Humidity Monitor with 2.1'' HD Screen & Indicator Visual&Audible Alarm for Home Travel Hotel RV

Plug in Carbon Monoxide Detector 3in1 CO Temperature Humidity Monitor with 2.1'' HD Screen & Indicator Visual&Audible Alarm for Home Travel Hotel RV

Gedsffati

8.0

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9

CRADTEC Smart Radon Detector, Radon Detector for Home, Digital Display, Easy-to-Use, Portable, Only Need 3 AAA Battery, Long and Short Term Monitor, Unit Switchable

CRADTEC Smart Radon Detector, Radon Detector for Home, Digital Display, Easy-to-Use, Portable, Only Need 3 AAA Battery, Long and Short Term Monitor, Unit Switchable

CRADTEC Smart Radon Detector, Radon Detector for Home, Digital Display, Easy-to-Use, Portable, Only Need 3 AAA Battery, Long and Short Term Monitor, Unit Switchable

CRADTEC

7.7

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10

Indoor Air Quality 9999ppm Digital Carbon Dioxide Detector Temperature Humidity NDIR Sensor IAQ CO2 Monitor CO2 Detector Meter WB DP Tester

Indoor Air Quality 9999ppm Digital Carbon Dioxide Detector Temperature Humidity NDIR Sensor IAQ CO2 Monitor CO2 Detector Meter WB DP Tester

Indoor Air Quality 9999ppm Digital Carbon Dioxide Detector Temperature Humidity NDIR Sensor IAQ CO2 Monitor CO2 Detector Meter WB DP Tester

GAIN EXPRESS

7.4

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