Best Carbon Monoxide Detector Reviews 2023

Carbon monoxide detectors are an essential part of every home. They warn you and your family if carbon monoxide concentrations reach a dangerous level. They can be combined with smoke detectors and may feature a digital display. We've looked at five of the best brands for carbon monoxide detectors, and picked five detectors with reputations for high-quality construction so that you can stay safe in your home.
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Our Top Choice
Nest Protect Smoke & Carbon Monoxide Alarm
Nest goes beyond safety with these convenient features: the Protect Smoke+CO Alarm feature wifi sync and pre-alarm warnings.
Wifi Sync. Battery life indicator. App connectivity. Split-spectrum sensor for emergency information. Heads-up alerts.
A bit more expensive than basic models.
5.3" x 1.5" x 5.3", 1 lb.
Battery Powered
Displays through smartphone
2-year limited warranty
Wifi connectivity
Best Value
First Alert Digital Carbon Monoxide Detector
First Alert is one of America’s most trusted brands in home safety. Their Dual-powered CO Detector offers protection for your family or business as well as peace of mind.
Front-access batteries. Dual-power design. No mounting required. Simple test and silence button.
May not last as long as more expensive models.
8.4" x 6.9" x 3", 12 oz.
Plug-in with Battery Back-up
7-year Limited Warranty
6-foot power cord
Sensorcon Portable CO Inspector
Sensorcon creates durable USA-made inspection tools like this portable CO detector for reliable, long-lasting safety.
Durable, waterproof construction. 2-year battery life. Large, simple LCD display. Handheld. Certified intrinsically safe. Good for industrial use.
Not meant for wall-mounting like the others on this list.
3.2" x 2.2" x 0.9", 4 oz.
1-Year Warranty
Kidde Smoke & Carbon Monoxide Detector
Kidde improves safety at home and at work with alarms like the Hardwired CO & Smoke Alarm with battery back-up power.
Connects with up to 24 other alarms. Battery back-up. Front-loading batteries. Hush feature. Detects fast-burning fires.
No display, but instead uses flashing lights and sound to indicate different situations.
2" x 6" x 6", 1.2 lbs.
AC Powered
No display
10-Year Limited
Connects with other Alarms
Universal Security Instruments Carbon Monoxide Detector.
Universal Security Instruments uses smart technology and superior design to maximize security like in this CO Detector.
10-year sealed battery. Smart microprocessors to reduce nuisance alarms. Can be mounted or left standing on a tabletop.
A few users received defective units and had to get their alarms replaced.
2.2" x 5" x 5", 6.4 oz.
No display
10-Year Limited Warranty
Smart Technology

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Watch Our Carbon Monoxide Detector Review

What is the Best Carbon Monoxide Detector?

Now that you’re aware of the factors to consider when purchasing a carbon monoxide detector, picking one that suits your needs should be less daunting. We’ve selected five top-rated and trustworthy brands that offer quality carbon monoxide detectors and other home safety solutions. We examined models in different types and with different features to find a dependable option for any budget. No matter what you choose or how many features you want, all these expert brands are reliable in an emergency.
Our Top Choice
The Nest Protect Battery-Powered Smoke & CO Detector connects to your phone through wifi for advanced functionality, including pre-alarm warnings, battery updates and more. Nest also offers a non-battery alternative – check out the Nest Protect Wired Smoke + CO Alarm.

Nest Protect Smoke + Carbon Monoxide Detector – Wifi Battery Alerts, Connected App, Heads-up

Nest is dedicated to helping families secure their homes with advanced, convenient technology: they offer compatibility with smart phone applications to give you more control over your own home. The Nest Protect Smoke & CO Alarm is especially convenient, making it easy to secure your home.

Let's see how this product can protect your nest:
  • The Nest Protect Alarm goes above and beyond by connecting to your wifi. Easily receive updates on battery life to stay safe at all times.
  • The connected app allows you to easily silence the alarm after it goes up simply by walking over to the alarm and opening the app.
  • Friendly heads-up alerts let you know when the alarm is about to go off so you can prevent burning foods from becoming a real problem. You also won't have to worry about the alarm going off every time you leave popcorn in the microwave too long.
  • A split-spectrum sensor allows this advanced monitor to tell the difference between fast and slow burning fires, to give you more information in an emergency.
  • The Nest Protect lets you know when and, more impressively, where there's smoke and carbon monoxide.
The Nest Protect Smoke & CO Alarm is available in a battery-powered and wired version. Both types come in either white or black.
Best Value
The First Alert Dual Power CO Alarm puts safety first with back-up battery power, easy alarm testing and at-a-glance battery life indicator. Looking for something less expensive? The classic First Alert CO Alarm is just as safe but comes at a lower price.

First Alert Dual Power Carbon Monoxide Alarm – Plug-in, Battery Backup, Digital Display

First Alert is passionate about providing a first line of defense against household emergencies. Their alarms, cameras and fire extinguishers are built to be durable so you can rely on them in dire circumstances. The First Alert Plug-in Digital CO Alarm keeps you prepared at all times with advanced sensors and its convenient display.

Let's see what makes First Alert both safe and convenient.
  • The First Alert Carbon Monixide alarm conveniently plugs into standard outlets and features backup batteries for safety even when the electricity is out or other unforeseen problems occur.
  • The alarm alerts you when the batteries are low so you can plan ahead and always stay safe.
  • The front has a convenient test and silence button.
  • Easily replace the batteries before they die with the front-access panel, without having to remove or fiddle with the alarm itself.
  • You can remotely turn off the alarm with your standard household remote control.
  • This alarm comes with a 7-year limited warranty and meets all UL standards.
  • The digital display automatically lights up the hazard level when the alarm is going off and when any button is pushed.
The First Alert Dual Power Carbon Monoxide Detector is available in a single or three-pack.
The Sensorcon Portable Carbon Monoxide Detector features industrial-level accuracy and durability, making it ideal for new homeowners as well as construction and inspection professionals. For increased precision and convenience, check out the Sensorcon Inspector CO Kit, featuring the detector, storage case and special pump kit to draw air from hard-to-reach areas.

Sensorcon Carbon Monoxide Meter and CO Meter – CO Inspector Industrial, Certified Intrinsically Safe Tough, Waterproof, Portable, LCD

Sensorcon prides itself on durable, USA-made products that always satisfy the customer. Their simple handheld meters are ideal for homeowners and professional inspectors alike. This Portable Carbon Monoxide Detector & Meter is waterproof, shock proof and built to last.

Let's take a closer look:
  • USA-made construction on top of great customer reviews means this CO meter is one you can trust.
  • The simple hand-held design and belt clip makes it easy to carry around this detector around your home or a jobsite.
  • The large LCD display and simple 2-button interface makes it easy to inspect any area for carbon monoxide.
  • This CO meter has a 2-year battery life for longer usage without the hassle.
  • The construction itself is waterproof and shock proof, making it ideal for worksites and heavy use.
  • Accurately gauge carbon monoxide concentrations from 0-2,000 ppm, so you know exactly what you're dealing with.
The Kidde Interconnected Smoke & CO Alarm features a range of emergency safety features and easily connects with up to 24 Kidde alarms for maximum safety. For an even easier alarm, check out the Kidde Voice-Activated Lithium Smoke & Carbon Monoxide Alarm.

Kidde Combination Carbon Monoxide + Smoke Detector – Tamper Resistant, Alarm Silencing

Kidde specializes in safety alarms and accessories for the home and business. Their designs are simple but include a wide range of safety features that are especially useful in an emergency. The Kidde Hardwired Combination Smoke & CO Detector ensures your safety with easy syncing to other alarms and more.

Let's take a look at some of the extensive safety features on the Kidde Smoke & CO alarm:
  • This smart alarm easily connects with up to 24 Kidde devices so that they can work together to warn anyone in the home of a dangerous situation.
  • Battery back-up means you can stay safe even in a power outage.
  • Front-loading battery compartment is easy to open without taking the alarm off the wall or ceiling.
  • The battery lockout system makes sure you can never close the battery compartment unless the batteries are installed correctly – meaning there's always a backup supply.
  • Peak level memory remembers if CO was detected since it was last reset, and lets you know by saying "carbon monoxide previously detected".
  • The hush features lets you easily silence alarms when you have the situation under control.
  • Ionization sensor technology is ideal for detecting fast-burning fires as well as other types of fires.
  • This alarm lets you know when it's using back-up battery power by flashing every 60 seconds so you can fix the electricity problem.
Kidde also offers a range of alarms with varying levels of convenience features to suit any home and budget.
The Universal Security Instruments Smart CO Alarm uses smart detection technology and an impressive 10-year battery life to keep you safe for years to come. For more information and an easier experience, check out the Universal Security Instruments CO Detector with Display Screen.

Universal Security Instruments CO Detector – Smart Microprocessors, Mounted & Tabletop

Universal Security Instruments creates heavy-duty, long-lasting safety equipment for homeowners. The Universal Security Instruments Smart Carbon Monoxide Alarm takes the stress away from home owners with set-and-forget design features.

Let's see what makes this alarm so easy to use.
  • The sealed 10-year battery improves safety by eliminating the possibility of running on dead batteries. Most alarms will use 20 batteries in 10 years, so you can save money while staying safe. Not to mention, you're also reducing battery waste and helping the environment!
  • Smart microprocessors help this alarm detect CO more precisely so you don't get seemingly random nuisance alarms. When the alarm does go off, you'll know it’s the real thing.
  • The alarm itself can be easily mounted to the wall or left standing on a tabletop or counter.
  • The 10-year limited warranty lasts as long as the batteries so you should be protected for the entire life of your alarm.

How Do I Choose the Best Carbon Monoxide Detector?

We all want our homes and families to be safe, but with fuel-burning appliances such as water heaters, grills, and fireplaces, people can be exposed to harmful gases. You need to have smoke detectors and carbon monoxide detectors to alert you of any brewing trouble.

Carbon monoxide detectors should be installed in all levels of your house, including the basement and near (not in) your attached garage. Before purchasing the device, conduct a survey of the local regulations and recommendations to identify where to install the gadget. Put the carbon monoxide detector where you can hear it even when you’re asleep. It is advisable to get a detector that can record carbon monoxide levels in your home. This will help in identifying the source of the killer gas for quick repairs.

If you decide to go for the battery-powered type, pick the right battery that will last a long time. If you go for the plug-in type, ensure it has a battery back-up in the unfortunate event of power blackout. Find a detector that will alert you when the battery is low. For enhanced home safety, be sure you also have the right fire extinguisher in case a fire breaks out.
This home safety device isn’t expensive. During our research, we found that high-quality carbon monoxide detectors will cost you between $20 and $150. Such a wide difference, right? There are reasons for this phenomenon. The price of a carbon monoxide detector will depend on its features. For instance, detectors with long-lasting batteries, or that can also detect smoke, come with a higher price tag. Ones whose batteries last for a few months and can only detect carbon monoxide usually cost less.

While there are cheap carbon monoxide detectors available, we found that most have less battery life and may require regular battery replacement, which may cost you more in the long run.
A key feature to consider is the type of the carbon monoxide detector. Is it hardwired, battery-powered or AC powered? Hardwired carbon monoxide detectors require a professional to install, adding to costs. If you have a large home with secluded areas, go for hardwired detectors. They can be interconnected, making it easy to hear the alarm from all areas. If you settle on a battery-powered model, check the battery life. Get a device whose battery life is more than six months.

If you’re looking for a quality carbon monoxide detector, consider the factors below:
  • The size of the device
  • Display feature: is it through a smartphone, digital or LCD?
  • Battery backup for hardwired detectors
  • Does it have a hush button to silence an irritating detector?
  • Power source
  • Volume
  • Warranty
  • Interconnectivity
Let’s take a closer look at these features.
Construction and Design
If you’re going to mount your detector on the wall, you'll want a light device. This will make installation easier and also prevent it from falling. If you are not going to mount the device on your ceiling, any size can get the job done. Consider the power source before purchasing. If you don’t wish to spend money on professional installation, look for battery-powered devices. However, if you have a large house, consider the hardwired ones as they can easily be interconnected, making the alarms from secluded areas such as the garage area audible. Interconnectivity makes the alarm audible regardless of where the leak occurs. Similarly, if you get a hardwired device, it should have a battery backup capability in case of a power interruption.
Performance and Ease of Use
A display feature that indicates the amount of carbon monoxide in your environment is advisable. This will allow you to take mitigating measures before the technicians arrive. Check if the display feature is digital, LCD, or through a smartphone. A device that can be connected with your smartphone is more effective, as you can read the amount of carbon monoxide in an area at any time.

If you get a battery-powered detector, check how often you’ll need to change the battery, and whether the device will alert you when the batteries are almost to die.

For the device to work properly, it should be loud enough to be heard by even the heaviest of the sleepers in your home. Check the decibel levels for a device with an alarm of 85 decibels and above. See whether the detector has a hush button to silence a nuisance device. The hush button is better than disabling the whole unit, as it will help you avoid the likelihood of forgetting to switch it on again. You may want a model that comes with a strong warranty, as it will ensure you’re covered in case of manufacturer’s defects.

Get the Best Carbon Monoxide Detector of 2023!

Home safety requires extensive research for an informed decision making. However, with a wide array of detectors to choose from, getting the right one can be a tiresome task. We hope our guide was helpful in directing you to the right carbon monoxide detector. If you didn’t find what you’re looking for in our list, the brands we’ve have selected have a wide array of other detectors that can suit your needs.

Our Top Choice
Nest Protect Smoke & Carbon Monoxide Alarm
Best Value
First Alert Digital Carbon Monoxide Detector
Sensorcon Portable CO Inspector
Kidde Smoke & Carbon Monoxide Detector
Universal Security Instruments Carbon Monoxide Detector.