BEST CARBON MONOXIDE DETECTORS OF 2026

The First Alert CO400 Carbon Monoxide Detector is designed to give you peace of mind by continuously monitoring CO levels in your home. This battery-operated unit ensures that you are protected even during power outages.

The user-friendly design includes an easy-to-read display that shows CO levels in parts per million (ppm), allowing you to take immediate action if needed. The device also emits a loud 85-decibel alarm when dangerous CO levels are detected, ensuring you are alerted even from a distance.

Installation is straightforward, requiring no wiring, and the compact design fits seamlessly into any room. With a 5-year limited warranty, the First Alert CO400 ensures long-lasting reliability.

The Kidde Nighthawk AC Plug-In Carbon Monoxide Detector is a top choice for homeowners seeking dependable CO detection with the convenience of a plug-in unit. This detector features a digital display that updates every 15 seconds to show current CO levels, ensuring you are always aware of your home's air quality.

The unit also includes a 9V battery backup, keeping it operational during power outages. Unique to the Nighthawk model is the peak level memory function, which stores the highest CO level detected since the last reset, allowing you to monitor long-term exposure.

The alarm produces an 85-decibel sound to alert you promptly of any CO danger. Easy to install, this unit plugs into any standard electrical outlet and can be placed on a tabletop or mounted on a wall.

The Nest Protect 2nd Generation Smoke and Carbon Monoxide Alarm combines advanced technology with user-friendly features to provide comprehensive home protection. This smart detector uses a split-spectrum sensor to differentiate between fast and slow-burning fires, ensuring accurate smoke detection.

For CO detection, it features an electrochemical sensor. The device connects to your home Wi-Fi network, allowing you to receive alerts on your smartphone through the Nest app. Voice alerts provide clear information about the type and location of the danger, helping you respond quickly and effectively.

The Pathlight feature illuminates your path at night, adding an extra layer of safety. Installation is simple, and the unit can be hardwired or battery-operated, depending on your preference.

The X-Sense SC01 Combination Smoke and Carbon Monoxide Detector offers dual protection with advanced sensors for both smoke and CO detection. This unit comes with a built-in 10-year lithium battery, eliminating the need for frequent battery replacements.

The large LCD display provides real-time updates on CO levels and battery status, ensuring you are always informed. The device features both a photoelectric smoke sensor and an electrochemical CO sensor, delivering accurate and timely alerts.

The loud 85-decibel alarm ensures you are alerted to any danger, even from a distance. Installation is easy, with options for wall or ceiling mounting. The sleek, modern design fits seamlessly into any home decor.

The Kidde 21008873 Battery-Operated Carbon Monoxide Alarm is a reliable and straightforward solution for safeguarding your home against CO exposure. This detector features a digital display that provides real-time CO levels, updated every 15 seconds.

The peak level memory function allows you to see the highest CO concentration detected since the last reset, helping you monitor long-term exposure. With its battery-operated design, this alarm remains functional during power outages, offering continuous protection.

The loud 85-decibel alarm ensures you are alerted to any danger promptly. Installation is hassle-free, with no wiring required, and the compact design allows for flexible placement in any room.