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10 Best Carbon Monoxide Detector 2025 in the United States
#1
Winner
Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
The Kidde Carbon Monoxide Detector is a reliable choice for home safety, featuring an electrochemical sensor that effectively detects carbon monoxide. Installation is straightforward as it simply plugs into a standard 120V outlet, and it includes a 2-AA battery backup to ensure continuous protection even during power outages. The detector emits an 85-decibel alarm when carbon monoxide is detected, which is loud enough to be heard throughout most homes.
Rating
9.8
Chosen by1,163
Power Source
Display and Alerts
Test and Silence Features
Most important from
34584 reviews
#2
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
The Kidde Carbon Monoxide Detector is a solid choice for anyone in need of a reliable and portable CO alarm. Its electrochemical sensor technology effectively detects carbon monoxide, ensuring safety during power failures since it operates on two included AA batteries. This makes it easy to install without any complicated wiring, allowing you to place it on a wall or a tabletop, which enhances its versatility. The product includes useful features like a green LED that confirms it's powered on, an 85-decibel alarm with a red LED for alerts, and an event memory that records the last detection, adding to its functionality.
Rating
9.6
Power Source
Display and Alerts
Test and Silence Features
Most important from
34417 reviews
#3
X-Sense Smoke Detector Carbon Monoxide Detector Combo, 10-Year Battery Smoke Detector with Display, Auto-Check, 3-Pack
The X-Sense Smoke Detector Carbon Monoxide Detector Combo offers two-in-one protection against both smoke and carbon monoxide, making it a practical choice for those looking for comprehensive safety in their home. One of its standout features is the 10-year sealed lithium battery, which means you won't need to worry about changing batteries frequently. This can be particularly appealing for busy households where ease of maintenance is a priority.
Rating
9.4
Display and Alerts
Test and Silence Features
Lifespan and Warranty
Most important from
1962 reviews
Top 10 Best Carbon Monoxide Detector 2025 in the United States
#1
Winner
9.8 score
Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
Sensor Type: Electrochemical
Power Source: Plug In, 2 AA battery
Display and Alerts: 85-decibel alarm, end-of-life chirp
Test and Silence Features: Test-Hush Button
Lifespan and Warranty: 10-year limited warranty
Chosen by 1163 this week
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Sensor Type: Electrochemical
Power Source: Battery Powered
Display and Alerts: Green LED, 85-decibel alarm, red LED
Test and Silence Features: Test-hush button
Lifespan and Warranty: 10-year limited warranty
X-Sense Smoke Detector Carbon Monoxide Detector Combo, 10-Year Battery Smoke Detector with Display, Auto-Check, 3-Pack
X-Sense Smoke Detector Carbon Monoxide Detector Combo, 10-Year Battery Smoke Detector with Display, Auto-Check, 3-Pack
Sensor Type: electrochemical, photoelectric
Power Source: 10-year lithium battery
Display and Alerts: Audible, 85 dB
X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display, Standalone Model, 5-Pack
X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display, Standalone Model, 5-Pack
Sensor Type: electrochemical, photoelectric
Power Source: Battery Powered
Display and Alerts: Large LCD, Audible alarm
Interconnectivity: None
Lifespan and Warranty: 10-year battery, 5-year warranty, 60-day guarantee
Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display
Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display
Sensor Type: Ionization
Power Source: Plug In, 9V battery backup
Display and Alerts: Digital LED, 85-decibel alarm
Test and Silence Features: Test-Hush Button
Lifespan and Warranty: 10-year limited warranty
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Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery Powered, LED Warning Light Indicators
Sensor Type: Photoelectric, Electrochemical
Power Source: Battery Powered
Display and Alerts: LED indicators, 85-decibel alarm
Test and Silence Features: Manual test button, self-tests
Interconnectivity: No
Lifespan and Warranty: 10 years
X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector, 10-Year Battery Powered Fire and CO Alarm, SC06-W, 6-Pack
X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector, 10-Year Battery Powered Fire and CO Alarm, SC06-W, 6-Pack
Sensor Type: Photoelectric, Electrochemical
Power Source: 10-year lithium battery
Test and Silence Features: Test/silence button
Interconnectivity: Wireless interconnectivity
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack
First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack
Sensor Type: Ionization
Power Source: Corded Electric with battery
Test and Silence Features: Test/silence button
Interconnectivity: Yes
X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo with Replaceable Battery, Wi-Fi Smoke and Carbon Monoxide Detector with Real-Time App Notifications, SC07-WX, 3-Pack
X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo with Replaceable Battery, Wi-Fi Smoke and Carbon Monoxide Detector with Real-Time App Notifications, SC07-WX, 3-Pack
Sensor Type: Photoelectric, Electrochemical
Power Source: Battery Powered
Display and Alerts: Real-time monitoring, instant alerts
Interconnectivity: No wireless interconnection
Lifespan and Warranty: Decade-long lifespan, 5-year warranty
#10
7.7 score
First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
Sensor Type: Electrochemical
Power Source: Corded Electric, Battery Backup
Display and Alerts: 85-decibel alarm, no display
Test and Silence Features: Single button, low battery mute
Interconnectivity: No
Lifespan and Warranty: 7-year warranty, end-of-life chirp
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Buying Guide for the Best Carbon Monoxide Detector
Choosing the right carbon monoxide detector is crucial for ensuring the safety of your home and loved ones. Carbon monoxide (CO) is a colorless, odorless gas that can be deadly if not detected early. A good CO detector will alert you to the presence of this dangerous gas, giving you time to take action. When selecting a carbon monoxide detector, consider the following key specifications to ensure you get the best fit for your needs.Sensor TypeThe sensor type in a carbon monoxide detector determines how it detects CO gas. There are three main types: electrochemical, metal oxide semiconductor, and biomimetic. Electrochemical sensors are the most common and reliable, providing accurate readings and a longer lifespan. Metal oxide semiconductor sensors are less expensive but may not be as accurate. Biomimetic sensors use a gel that changes color when exposed to CO, which can be less precise. For most users, an electrochemical sensor is the best choice due to its reliability and accuracy.
Power SourceCarbon monoxide detectors can be powered by batteries, hardwired into your home's electrical system, or plugged into an outlet. Battery-powered detectors are easy to install and can be placed anywhere, but you need to remember to replace the batteries regularly. Hardwired detectors are more permanent and often come with a battery backup in case of power outages. Plug-in detectors are convenient but need to be placed near an outlet. Choose a power source that fits your home's setup and your preference for maintenance.
Display and AlertsA good carbon monoxide detector should have a clear display and loud alerts. The display can show CO levels in parts per million (ppm), which helps you understand the severity of the situation. Some detectors also have digital displays that show the peak level of CO detected. Alerts should be loud enough to wake you up if CO levels rise while you are sleeping. Look for detectors with both visual and audible alarms to ensure you are alerted in any situation.
Test and Silence FeaturesTest and silence features are important for maintaining your carbon monoxide detector. The test button allows you to check if the detector is working properly, while the silence button lets you temporarily mute the alarm if it goes off accidentally. Regularly testing your detector ensures it is functioning correctly, and the silence feature can prevent unnecessary noise while you address the cause of the alarm. Make sure the detector you choose has easy-to-use test and silence buttons.
InterconnectivityInterconnectivity allows multiple carbon monoxide detectors to communicate with each other. If one detector senses CO, all interconnected detectors will sound the alarm, providing a more comprehensive warning system. This feature is especially useful in larger homes or multi-story buildings. If you have a larger home or want to ensure maximum safety, look for detectors that can be interconnected either wirelessly or through hardwiring.
Lifespan and WarrantyThe lifespan of a carbon monoxide detector is the period during which it can reliably detect CO. Most detectors have a lifespan of 5 to 10 years. After this period, the sensors may become less accurate, and the detector should be replaced. Check the manufacturer's recommendations for the lifespan and look for detectors with a warranty that covers at least the expected lifespan. This ensures you are protected against defects and can rely on the detector for the specified period.