The 9 Best Carbon Monoxide Detectors

Updated June 22, 2017 by Ezra Glenn

9 Best Carbon Monoxide Detectors
Best High-End
Best Mid-Range
Best Inexpensive
We spent 26 hours on research, videography, and editing, to review the top choices for this wiki. Being odorless and colorless, carbon monoxide is a potentially lethal danger in any home, office or other workplace. But with today's technology, it's pretty easy to keep your employees, colleagues, and family safe from this silent killer. One of these CO detectors will quickly warn you at the first sign of dangerous levels in the air. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best carbon monoxide detector on Amazon.

9. First Alert SCO5CN

Combining the utility of a deadly gas sensor with a smoke alarm, the First Alert SCO5CN is always ready to warn you of danger. It uses photoelectric detection technology, nearly eliminating the possibility of false alarms, and can be mounted to almost any ceiling or wall.
  • two aa batteries included
  • three-chirp end-of-life alert
  • some units die quickly
Brand First Alert
Model SCO5CN
Weight 7.2 ounces
Rating 4.4 / 5.0

8. Honeywell Ademco 5800CO

The battery-powered Honeywell Ademco 5800CO can be easily mounted to most ceilings and uses an electrochemical sensor to ensure accuracy. It features a normal status indicator and a low battery alarm to ensure continuous protection at all times.
  • can connect to home security systems
  • good option for hard-to-wire areas
  • only designed to last 5 years
Brand Ademco
Model 5800co
Weight 10.4 ounces
Rating 4.3 / 5.0

7. Ardwolf Battery-Powered

The Ardwolf Battery-Powered runs on three AAs and boasts a Japanese Figaro sensor that acts quickly to alert you when the toxins in your air approach unsafe levels. If it does ever go off, its loud alarm can easily be heard up to 100 feet away.
  • includes mounting hardware
  • sensor lasts up to 7 years
  • doesn't react to levels under 70 ppm
Brand Ardwolf
Model pending
Weight 4.8 ounces
Rating 3.7 / 5.0

6. BRK Electronics CO5120BN

Simple but effective, a 2-pack of the BRK Electronics CO5120BN allows you to ensure the air in your home is safe thanks to its microprocessor-controlled sensor. A hard-wired model, each unit comes with a 9-volt battery for backup in case of a power outage.
  • battery is easy to replace
  • convenient silence and test button
  • may malfunction in high humidity
Brand BRK Brands
Model 3055574
Weight 1.5 pounds
Rating 3.9 / 5.0

5. Kidde Nighthawk

With a digital readout to monitor CO levels, the Kidde Nighthawk reliably protects your property and family. It can be easily wall-mounted and its battery door is simple to remove and replace, so there's no excuse for not putting in a fresh set when the time comes.
  • easy-to-read led screen
  • backed by a 10-year limited warranty
  • occasional false alarm issues
Brand Kidde
Model 21008873
Weight 5.6 ounces
Rating 4.5 / 5.0

4. Pyle PCMM05

The handheld Pyle PCMM05 makes it simple to test the safety levels in the air in both residential and industrial settings. It uses electrochemical sensors that react quickly to high concentration levels of CO and produces both visible and audible alarm signals.
  • bright color stands out
  • lcd is easy to read at a glance
  • auto-off feature saves battery life
Brand Pyle
Model PCMM05
Weight 7.2 ounces
Rating 4.8 / 5.0

3. First Alert CO615

With a backlit, multifunctional display, the First Alert CO615 is built for reliability and dependability at all times. Though the power indicator light is intensely bright, it does offer peace of mind by exceeding all required safety standards for use in American homes.
  • convenient peak level memory
  • plugs into a standard outlet easily
  • includes a built-in extension cord
Brand First Alert
Model CO615
Weight 1.2 pounds
Rating 4.7 / 5.0

2. Kidde C3010D

The Kidde C3010D has a sealed lithium battery that will last for 10 years, so you don't have to worry about annoying low-battery chirps. It is tamper-resistant for your protection, so make sure to employ the deactivation switch before removing it from its wall mount.
  • sleek and compact design
  • updates readings every 15 seconds
  • audio and visual alarm indicators
Brand Kidde
Model 21010047
Weight 10.4 ounces
Rating 4.6 / 5.0

1. Nest Protect 2

If you're the sort of person who likes to know what's going on with every aspect of your home even when you're not there, the Nest Protect 2 was made for you. It connects to your Wi-Fi network to send alerts to your phone, and works as a fire alarm as well.
  • alarm can be silenced remotely
  • available wired or battery-powered
  • easy to install and set up
Brand Nest
Model S3000BWES
Weight 1.8 pounds
Rating 4.6 / 5.0

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Last updated on June 22, 2017 by Ezra Glenn

Ezra is a writer, photographer, creative producer, designer, and record label-operator from New York City. He's traveled around the world and ended up back where he started, though he's constantly threatening to leave again.


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