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10 Best Carbon Monoxide Detectors 2025 in the United States
#1
Winner
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 is a reliable device that offers dual protection against smoke and carbon monoxide. A standout feature is its 10-year sealed battery, meaning you won’t need to worry about changing batteries for a decade. Installation is straightforward as it requires no rewiring, making it user-friendly.
Rating
9.9
Chosen by1,496
Power Source
Display and Alerts
Installation Location
Most important from
1958 reviews
#2
FIRST ALERT Plug-In Carbon Monoxide Detector with Battery Backup, (Pack of 3), CO605
The FIRST ALERT Plug-In Carbon Monoxide Detector with Battery Backup, available in a pack of three, is designed to provide comprehensive CO detection across multiple rooms. The electrochemical sensor type is a strong point, offering accurate detection of carbon monoxide levels regardless of placement in the room. The dual power source with both plug-in and battery backup ensures continuous monitoring even during power outages, adding a layer of reliability and safety.
Rating
9.8
Power Source
Installation Location
Additional Features
Most important from
21907 reviews
#3
FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White
The FIRST ALERT BRK SC9120FF combines smoke and carbon monoxide detection, making it a versatile choice for home safety. Its hardwired design, paired with a battery backup, ensures continuous operation even during power outages. This model features dual sensors: electrochemical for detecting carbon monoxide, and ionization for smoke, providing reliable detection.
Rating
9.7
Installation Location
Most important from
27064 reviews
Top 10 Best Carbon Monoxide Detectors 2025 in the United States
#1
Winner
9.9 score
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: Battery Powered
Display and Alerts: 85 dB alarm
Additional Features: 10-year sealed battery, heat-resistant
Chosen by 1496 this week
FIRST ALERT Plug-In Carbon Monoxide Detector with Battery Backup, (Pack of 3), CO605
FIRST ALERT Plug-In Carbon Monoxide Detector with Battery Backup, (Pack of 3), CO605
Sensor Type: Electrochemical
Power Source: Battery Powered, Plug-in
Display and Alerts: 85-decibel alarm, end-of-life chirp
Installation Location: Plug into standard outlet
Additional Features: Single test/silence button, 7-year warranty
FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White
FIRST ALERT BRK SC9120FF Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack , White
Sensor Type: electrochemical, ionization
Power Source: Battery, Hardwired
Display and Alerts: 85-decibel alarm
Installation Location: accessible electrical connections
Additional Features: connect with detectors, tamper-resistant
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
Additional Features: Wireless interconnection, test button
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X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo, Battery-Operated (Not AC Hardwired) Interconnected Combination Smoke Carbon Monoxide Detector, 5 Detectors with 1 Base Station, SC07-MR51
X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo, Battery-Operated (Not AC Hardwired) Interconnected Combination Smoke Carbon Monoxide Detector, 5 Detectors with 1 Base Station, SC07-MR51
Sensor Type: Photoelectric
Power Source: Battery Powered
Display and Alerts: App alerts for low battery
Additional Features: Wireless interconnectivity, app control
First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup
First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup
Sensor Type: Ionization
Power Source: Battery, Hardwired with 9-volt backup
Display and Alerts: Audible alarm, smoke and CO alerts
Installation Location: Hardwired into home's electrical system
Additional Features: Inter-connectability, Silence/test button, 10-year warranty
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Buying Guide for the Best Carbon Monoxide Detectors
Choosing the right carbon monoxide detector is crucial for ensuring the safety of your home and family. Carbon monoxide is a colorless, odorless gas that can be deadly, so having a reliable detector is essential. When selecting a carbon monoxide detector, consider the following key specifications to make an informed decision that best fits your needs.Sensor TypeThe sensor type in a carbon monoxide detector determines how it detects the presence of carbon monoxide. Common sensor types include electrochemical, biomimetic, and metal oxide semiconductor sensors. Electrochemical sensors are highly accurate and respond quickly to CO levels, making them ideal for most homes. Biomimetic sensors mimic the human body's response to CO and are also reliable but may require more frequent replacement. Metal oxide semiconductor sensors are less common but can be effective in certain environments. Choose a sensor type based on the accuracy and reliability you need for your specific situation.
Power SourceCarbon monoxide detectors can be powered by batteries, hardwired into your home's electrical system, or plugged into an outlet. Battery-powered detectors offer flexibility in placement and continue to work during power outages, but require regular battery replacement. Hardwired detectors are more permanent and often come with battery backup, ensuring continuous operation even during power outages. Plug-in detectors are easy to install and can be moved around, but may not work during power outages unless they have battery backup. Consider your home's layout and your preference for maintenance when choosing the power source.
Display and AlertsThe display and alert system of a carbon monoxide detector provide critical information about CO levels and alert you to danger. Some detectors have digital displays that show real-time CO levels, which can be useful for monitoring and understanding the severity of the situation. Others may have simple LED indicators or audible alarms. Look for detectors with loud, clear alarms and consider additional features like voice alerts or smartphone connectivity for remote monitoring. Choose a display and alert system that ensures you can quickly and easily respond to any CO threat.
Installation LocationThe location where you install your carbon monoxide detector can significantly impact its effectiveness. Detectors should be placed near sleeping areas and on every level of your home to ensure comprehensive coverage. Avoid placing detectors too close to fuel-burning appliances, as this can lead to false alarms. Consider models that offer flexibility in installation, such as wall-mounted or ceiling-mounted options. Assess your home's layout and identify key areas where CO exposure is most likely to ensure optimal placement of your detectors.
Additional FeaturesSome carbon monoxide detectors come with additional features that can enhance their functionality and convenience. Features like interconnected alarms, which allow all detectors in your home to sound simultaneously, can provide added safety. Smart detectors that connect to your home automation system or smartphone can offer remote monitoring and alerts. Some models also include combination smoke and CO detection, providing dual protection in a single device. Evaluate which additional features are important to you based on your lifestyle and home setup to choose a detector that offers the best overall protection.