The 10 Best Carbon Monoxide Detectors of 2020

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Carbon monoxide is a dangerous invisible gas. Without a reliable detector, it’s pretty much impossible to identify it given how it also lacks any odor and is totally noiseless. A CO alarm will promptly alert you in case of dangerous leaks. This device is handy to have if you’re a home user. It’s highly recommended to install one for your RV or garage. Contained areas with limited square footage can be especially dangerous so investing in a performant carbon monoxide detector represents the best solution.

Carbon monoxide alarms work in a similar manner like smoke detectors, except they activate when dangerous CO levels are detected. Some units can also include a smoke alarm so you can also stay protected against potential fires. Due to the fact that CO detectors come in different shapes and show off many confusing features, this article has been designed to simplify your decision process. We’ve collected the best carbon monoxide alarms on the market in terms of performance and reliability for the cost. These are the detectors that use the latest technologies to keep you and your family safe from the dangers of carbon monoxide.

1. Nest S3000BWES Carbon Monoxide Detector – Best Carbon Monoxide And Smoke Detector

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Combining both a powerful carbon monoxide detector and a reliable smoke alarm, the Nest Protect S3000BWES represents the top choice to stay protected against dangerous levels of CO gas. This unit has been designed in the USA and comes with a Split-Spectrum sensor which can detect the gas in record time. The device can connect to Wi-Fi to send you an alert no matter where you are.

Another practical feature is the illumination that activates when someone walks under the detector. The CO alarm is smart enough to give you more information about the potential gas leak or signs of fire detected. There are two power options to choose: a long-lasting battery or wired connectivity. The sensors are designed to remain reliable at detecting CO for approximately 10 years. Well-designed in all regards and very dependable, the Nest Protect S3000BWES is totally worth the cost.

2. Kidde KN-COPP-3 Nighthawk Carbon Monoxide Detector – Best Plug-In Carbon Monoxide Detector

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When it comes to CO alarms, many people worry about battery life or power outages that will make the detector suddenly fail when it matters. For maximum reliability, we recommend going for a plug-in carbon monoxide detector like the Kidde Nighthawk. Even if the power goes out for an extended period of time, the detector should remain functional thanks to its battery backup feature.

One solid feature of this CO detector is the ability to display the peak level of carbon monoxide. You can also use the test button on its user-friendly interface to ensure the alarm works as expected. Check the blinking dot on the LED display to make sure the detector operates normally. CO levels detected are continuously shown on the screen. The Kidde Nighthawk is designed to work for 10 years. After this time, the unit will alert you to replace the detector.

3. First Alert CO615 Carbon Monoxide Detector

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The First Alert CO615 is a very advanced carbon monoxide detector alarm featuring a battery backup and a high-visibility digital display. This device meets UL standards so you can count on its efficacy in terms of keeping you safe from dangerous concentrations of carbon monoxide. On its digital display, you can see the peak level of the detected gas. To maximize protection, we recommend setting up one device for each room in your house. These are very reliable carbon monoxide alarms which also feature a sensitive electrochemical sensor.

The detector comes packed with a loud 85-decibel alarm that serves as a powerful warning signal. If there is a sudden power outage the detector will switch to batteries as a primary source of energy. Another great feature of this unit is the way it alerts you in case of low battery or if the battery is removed. It also gives an alert when it’s time to replace the carbon monoxide detector. In conclusion, First Alert did a very good job with this CO-detecting device so we highly recommend it for all kinds of users.

4. Kidde KN-Copp-B-LPM Carbon Monoxide Detector – Best Battery-Operated Carbon Monoxide Detector

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There are many great carbon monoxide detectors on the market that allow you to stay safe from the danger of this toxic gas. The Kidde KN-Copp-B-LPM is a battery-operated unit that features an intuitive slide-out battery door and a very well-designed panel interface complete with a digital display. When elevated levels of CO are detected, the alarm goes off with a very loud warning signal.

This carbon monoxide detector comes with LEDs used to check out the operating status. When it flashes green every 30 seconds, it means the detector works as expected. The red LED pulse combined with the loud sound means that it’s dangerous to remain nearby so you have to evacuate as fast as possible. You need three AA batteries to power the CO alarm and there is a test/reset button which can be used to stop the warning signal.

5. First Alert CO605 Carbon Monoxide Detector

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First Alert is a popular manufacturer of carbon monoxide detectors. They have some of the most reliable devices you can buy to keep your family safe from dangerous CO levels. One of the best First Alert models to consider is the CO605. This is a dual-power CO alarm which means it relies on a battery backup in case of power failures. The small device monitors carbon monoxide levels all the time and sounds a loud 85db alarm when hazardous leaks are detected.

The sensor used for this CO alarm makes use of advanced electrochemical technology. Whether it’s from the furnace, chimney, or dryer vent, this detector will alert you if carbon monoxide levels go above safe limits. Thanks to an easy-to-read LED display, you can check the current CO levels at a simple glance. The primary source of power for the detector is a power outlet but you can also count on the battery backup when needed.

6. Kidde KN-COB-B-LP2 Carbon Monoxide Detector

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If you’re looking for a capable battery-operated carbon monoxide detector, the Kidde KN-COB-B-LP2 is an important unit to take into account. As it relies on battery power, you don’t need to worry about a lack of protection if you live in an area with frequent power outages. There’s a battery safeguard in place to prevent the closing of the device without the required batteries inside.

The interface of this CO alarm has been designed with user-friendliness in mind. There’s a reset button which can also be used to test the unit’s normal functionality. The green LED shows you normal operation levels while the red one accompanies the loud alarm in case of dangerous CO concentrations. There’s a practical low battery signal emitted by the carbon monoxide detector so you will always be aware when it’s time to replace the batteries.

7. First Alert CO600 Carbon Monoxide Detector – Best Budget Carbon Monoxide Detector

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Inexpensive and convenient to use in every room of the home, the First Alert CO600 provides optimal protection against dangerous concentrations of carbon monoxide. Although it lacks a digital display, the detector is simple to use and beeps loudly to alert you. Thanks to the incorporated electrochemical CO sensor, the device should be able to detect gas leaks regardless of room placement.

This CO detector has been very carefully tested to meet UL standards. It can be considered one of the most dependable units on the market. Power comes from a wall outlet connection but there’s also a battery backup to maintain functionality through short-term power outages. The alarm of this detector features a decibel rating of 85 which means it should be easy to hear so you can get out of the danger zone as fast as possible.

8. First Alert CO400 Carbon Monoxide Detector

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One affordable and practical carbon monoxide detector comes once again from First Alert. This model is called CO400 and it seems to deliver a quality experience for anyone looking to protect themselves from the danger of carbon monoxide. The unit is powered by a 9-volt replaceable battery and its permanent sensor has been designed to resist for up to 5 years. There is virtually no installation required and you don’t have to place the device on the ceiling as you’d normally do with a smoke alarm.

It may be possible to need more detectors if you have a big house and you wish to stay fully protected in all the rooms in the home. This model has a very attractive design and its alarm is very loud. It also provides a handy alert for when it’s time to replace the battery as this model is battery powered. The detector is UL listed and the package includes the required batteries already so you can basically use it right away. Even if it lacks a digital display, the First Alert CO400 is still worth the modest investment.

9. Alert Plus AP-6987 Carbon Monoxide Detector

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The threat of carbon monoxide makes it pretty much mandatory for anyone to install a reliable detector in your home. With a human voice prompt feature and a sensitive catalytic combustion method sensor, this carbon monoxide alarm from Alert Plus offers great value for the cost. No matter how small the leak is, this detector can alert you to take the necessary steps and control it before it becomes dangerous. This is a battery-powered unit that offers a small LED display where you can check the battery capacity and the carbon monoxide concentration. There’s also a clock shown to make this a multi-purpose product.

The device has been designed to be as energy-efficient as possible so it can remain in standby for an extended period of time. Its 9-volt battery shouldn’t be getting used up too fast. The CO detector can automatically alert you in case of a sensor failure so you can rest assured that this is a dependable carbon monoxide alarm no matter what. Whether we’re talking about an office building, warehouse, or a typical household, any indoor place can benefit from this smartly designed carbon monoxide detector.

10. Kidde KNCOB-DP2 Carbon Monoxide Detector

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Accidental tampering with a carbon monoxide detector can make the device useless and leave you exposed to danger. This is why the Kidde KnCOB-DP2 offers a tamper-resistant feature which makes it a valuable alarm to consider. This is a plug-in carbon monoxide detector that also incorporates a 9-volt battery backup. You need two AA batteries for complete protection against power failures.

There is no display featured for this model and that’s pretty much as expected considering the more affordable price tag. What matters more is that the detector comes with a reliable sensor which activates a powerful alarm whenever CO concentrations go above safety levels. All in all, this is a fairly basic carbon monoxide detector but it does its job in a reliable manner. Thanks to its small sleek design, this represents an inconspicuous device so you can count on it in all kinds of indoor places.