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Best carbon monoxide detectors - June 2026

Last Updated - June 22, 2026

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde

Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 4 Pack

Kidde

$174.98

More Details
Main highlights
- TESTED FOR RELIABILITY & COMPLIANCE: Rigorously tested to meet UL 217 10th Edition, UL 2034 5th Edition, and FCC standards for performance and safety; enhanced sensing technology helps reduce false alarms from everyday cooking or steam
- REDUCED FALSE ALARMS: Uses advanced sensing technology that helps distinguish between real smoke and everyday cooking or steam; helps reduce false alarms while maintaining quick, accurate detection when smoke is present
- BUILT FOR HOMEOWNERS AND PROFESSIONALS: Designed for those who prioritize dependable, code-compliant detection; supports safety goals for homeowners, property managers, contractors, and professionals seeking long-term home safety assurance
- AA BATTERY OPERATION & WARRANTY: Powered by two AA batteries (included) for easy, no-wiring setup; Backed by 10-year limited warranty** that starts from date of purchase
- 2-in-1 DETECTION: Model 30CUDR detects both smoke and carbon monoxide and features advanced sensing technology with over 25% faster smoke detection*; sounds a loud 85-decibel alarm with red LED light for clear visual warnings; suitable for homes
$174.98
2
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert SC5 Hardwire Smart Smoke & Carbon Monoxide Alarm, SMCO600NV-AC, 1-Pack

First Alert

$129.00

More Details
Main highlights
- Voice alerts with Heads-Up warning tells you the type and location of danger in your home
- Sends alerts to your phone if smoke and CO are detected through the First Alert app
- Quick Connect Plug allows for easy installation and replacements with no need to rewire
- Interconnect so when one alarm sounds, all compatible alarms in the home sound
- Equipped with Precision Detection Technology to help reduce nuisance alarms and provide an early warning
- Compatible with Google's Nest Protect Alarm
- Battery backup provides continuous protection during power outages
$129.00
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde

Kidde Carbon Monoxide Detector, AA Battery Powered, Portable for Travel or Home, 85 dB Alarm, LED Status Indicators, 3rd Edition

Kidde

$23.97

More Details
Main highlights
- Green LED indicates power to the carbon monoxide detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
- Event Memory records the last time carbon monoxide was detected or when the unit was last tested
- Electrochemical sensor technology detects CO gas
- Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included); Install on a wall of your home or place on a tabletop
$23.97
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde

Kidde Carbon Monoxide Detector, Plug-in with AA Battery Backup, Easy-to-Read Digital Backlit Display, 85 dB Alarm, Rotating Plug, LED Status Light Indicators, 5th Edition, COPD

Kidde

$43.97

More Details
Main highlights
- TRAVEL-READY DESIGN*: Compact carbon monoxide detector is suitable for use at home or for travel; lightweight design allows you to take it on the go to use in hotels or vacation rentals when detection is needed away from home
- TESTED & TRUSTED: This carbon monoxide alarm is rigorously tested to meet UL 2034 5th Edition standards, and is ETL Listed; includes a 10-year limited warranty on alarm
- PLUG-IN POWER WITH BATTERY BACKUP: CO detector plug-in operates on 120V AC with 2 AA backup batteries (included) for detection during outages; rotating plug fits vertical or horizontal outlets; includes power surge immunity to help maintain performance
- DETECTS CARBON MONOXIDE: With backlit display that shows CO levels & sounds a loud 85 dB alarm when CO is detected to signal evacuation; sleep peacefully with no nighttime chirps; LED warning light indicates hazard; Test/Hush button for quick checks
- BUILT FOR EVERY HOUSEHOLD: Designed to help provide dependable carbon monoxide monitoring for everyday residential use; supports renters, homeowners, and pet owners seeking added awareness and protection from CO hazards in the home
$43.97
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert CO606, Plug-In Carbon Monoxide (CO) Detector, Hardwired Alarm with Battery Backup, 3-Pack

First Alert

$69.40

More Details
Main highlights
- To ensure complete protection make sure to place 1 on each level of your home and in each bedroom
- Simple to use, with a single test/silence button; A loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels
- Keep your family safe from carbon monoxide in multiple rooms with this convenient plug in carbon monoxide alarm 3 pack; The alarms work with any standard outlet and also have a battery backup for continuous monitoring of CO levels, even if there's a power failure
- Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
- All First Alert CO alarms are rigorously tested to meet UL standards
- 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
$69.40

Best carbon monoxide detectors - June 2026

Kidde Smoke and Carbon Monoxide Detector, AA Battery Powered with LED Status Lights, 85 dB Alarm, 5 inches, 30CUDR, 4 Pack

First Alert SC5 Hardwire Smart Smoke & Carbon Monoxide Alarm, SMCO600NV-AC, 1-Pack

Kidde Carbon Monoxide Detector, AA Battery Powered, Portable for Travel or Home, 85 dB Alarm, LED Status Indicators, 3rd Edition

Kidde Carbon Monoxide Detector, Plug-in with AA Battery Backup, Easy-to-Read Digital Backlit Display, 85 dB Alarm, Rotating Plug, LED Status Light Indicators, 5th Edition, COPD

First Alert CO606, Plug-In Carbon Monoxide (CO) Detector, Hardwired Alarm with Battery Backup, 3-Pack

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