10 Best Carbon Monoxide Detector 2026 in the United States
#1
Winner
Kidde Carbon Monoxide + Explosive Gas, Natural Gas & Propane Alarm, Plug-in with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Indicators, 3rd Edition
The Kidde Carbon Monoxide Detector is designed to detect carbon monoxide as well as propane, natural gas, methane, and other explosive gases, making it a versatile safety device for homes with multiple fuel sources. It plugs into a standard 120V outlet and includes a 9-volt battery backup, allowing it to continue operating during power outages for uninterrupted protection. The digital LED display provides current CO levels and alerts for explosive gases, offering clear, real-time information beyond a simple alarm sound.
Rating
10.0
Chosen by1,112
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585 reviews
#2
Kidde Carbon Monoxide Detector, AA Battery Powered, Portable for Travel or Home, 85 dB Alarm, LED Status Light Indicators, 5th Edition, COB
The Kidde Carbon Monoxide Detector is a solid choice for anyone looking to add CO safety at home or on the go. It uses an electrochemical sensor, which is reliable for detecting dangerous carbon monoxide levels. Powered by two AA batteries, it offers easy installation without needing any wiring and will keep working during power outages, which is very convenient. The detector has a loud 85 dB alarm and LED lights to alert you quickly if there’s a problem. You can test or silence the alarm with a simple button, making it user-friendly.
Rating
10.0
Power Source
Display and Alerts
Most important from
1611 reviews
#3
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUA10, 1 Pack
The Kidde Smoke and Carbon Monoxide Detector 30CUA10 is a solid choice for homeowners who want a dependable, dual-function alarm that detects both smoke and carbon monoxide. It uses photoelectric and electrochemical sensors, which are effective in spotting smoke and CO quickly, helping to reduce false alarms caused by cooking or steam. This model is hardwired into your home’s electrical system, so you don’t need to worry about frequently changing batteries, but it also includes a 10-year battery backup for power outages – a feature that adds peace of mind and saves money over time.
Rating
9.1
Sensor Type
Power Source
Display and Alerts
Most important from
1187 reviews
Top 10 Best Carbon Monoxide Detector 2026 in the United States
#1
Winner
Kidde Carbon Monoxide + Explosive Gas, Natural Gas & Propane Alarm, Plug-in with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Indicators, 3rd Edition
Kidde Carbon Monoxide + Explosive Gas, Natural Gas & Propane Alarm, Plug-in with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Indicators, 3rd Edition
Power Source: Plug In, 9V battery backup
Display and Alerts: Digital LED, 85-decibel alert
Test and Silence Features: Peak Level Memory function
Interconnectivity: None
Chosen by 1112 this week
Kidde Carbon Monoxide Detector, AA Battery Powered, Portable for Travel or Home, 85 dB Alarm, LED Status Light Indicators, 5th Edition, COB
Kidde Carbon Monoxide Detector, AA Battery Powered, Portable for Travel or Home, 85 dB Alarm, LED Status Light Indicators, 5th Edition, COB
Sensor Type: Electrochemical
Power Source: Battery Powered
Display and Alerts: 85 dB alarm, LED lights
Test and Silence Features: Button to test or silence alarm
Interconnectivity: None
Lifespan and Warranty: 10-year limited warranty
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUA10, 1 Pack
Kidde Smoke and Carbon Monoxide Detector, Hardwired with 10-Year Battery Backup, LED Status Lights, Interconnected, 85 dB Alarm, 5 inches, 30CUA10, 1 Pack
Sensor Type: Photoelectric, Electrochemical
Power Source: Hardwired
Display and Alerts: 85 dB alarm, LED lights
Test and Silence Features: Easy test and silence
Interconnectivity: Connects to other Kidde alarms
Lifespan and Warranty: 10 years lifespan, limited warranty
Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
Kidde Smoke and Carbon Monoxide Detector, 10-Year Battery Powered, LED Status Lights, 85 dB Alarm, 5-inches, 30CUD10, 1 Pack
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
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 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
Sensor Type: Electrochemical
Power Source: Corded Electric, AA Batteries
Display and Alerts: Digital display, 85 dB alarm, LED
Test and Silence Features: Test and silence button
Interconnectivity: None
Lifespan and Warranty: 10-year limited warranty
Related Products
Up to 14% off
Kidde Smart Smoke and Carbon Monoxide Detector, Ring App Enabled for Real-Time Notifications, Hardwired Alarm, AA Backup Battery
Kidde Smart Smoke and Carbon Monoxide Detector, Ring App Enabled for Real-Time Notifications, Hardwired Alarm, AA Backup Battery
Sensor Type: Photoelectric, Electrochemical
Power Source: Hardwired
Display and Alerts: Audible, Real-time Ring app alerts
Test and Silence Features: Basic test and silence
Interconnectivity: Link alarms, mobile alerts, Alexa
Kidde Smart Smoke and Carbon Monoxide Detector, Ring App Enabled for Real-Time Notifications, Wire-Free Interconnectivity, AA Battery Powered
Kidde Smart Smoke and Carbon Monoxide Detector, Ring App Enabled for Real-Time Notifications, Wire-Free Interconnectivity, AA Battery Powered
Sensor Type: Photoelectric, Electrochemical
Power Source: Battery Powered
Display and Alerts: Audible alarms, phone notifications
Test and Silence Features: Test and silence to reduce alarms
Interconnectivity: Wire-free, alarms sound together
Kidde Carbon Monoxide Detector, Plug-In with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Light Indicators, 3rd Edition
Kidde Carbon Monoxide Detector, Plug-In with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Light Indicators, 3rd Edition
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
BRK SC9120B Smoke and Carbon Monoxide Alarm
BRK SC9120B Smoke and Carbon Monoxide Alarm
Sensor Type: ionization and CO sensors
Power Source: 9-volt battery
Display and Alerts: Separate smoke and CO indicators
Test and Silence Features: easy test and silence buttons
Interconnectivity: connects with BRK or First Alert
Lifespan and Warranty: 7-year limited warranty
#10
Kidde Carbon Monoxide Detector, Plug-in Carbon Monoxide Detector with AA Battery Backup, 85 dB Alarm, LED Status Light Indicators, 3rd Edition
Kidde Carbon Monoxide Detector, Plug-in Carbon Monoxide Detector with AA Battery Backup, 85 dB Alarm, LED Status Light Indicators, 3rd Edition
Power Source: Plug In with AA backup
Display and Alerts: No display; 85dB audible alarm
Test and Silence Features: Test-Hush button
Interconnectivity: None
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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.