10 Best Carbon Monoxide Detectors
for December 2023

The Kidde Carbon Monoxide Alarm (model 9572) is on our list of the top 10 home alarms because it's easy to use, has a battery backup, and works well. The alarm has a battery backup, so if the power goes out it works. The alarm has bright and clearly visible LED lights that flash when the alarm is triggered. The alarm has a 2-year warranty, and is very easy to install. The alarm also has two different alert modes: a silent alarm, and an alarm that reminds you to check the detector. The alarm has a 125-decibel alarm, which is loud enough to be heard through most doors. The alarm has a 4-level alarm, so you can set it so that it's not too loud for you, and loud enough to be heard throughout your home. The alarm is battery operated, so it works during a power failure. The alarm has 10-year sealed battery, which is supposed to last for at least 10 years. The alarm has 2-year limited warranty.

The Brk SC9120B is an excellent choice for homeowners who want a hardwired detector that stays plugged in and requires no battery changes. It has the same bells and whistles as our previous pick, the Nest Protect, but it's a more affordable option, and it's more widely available. Like the Nest Protect, the Brk SC9120B uses an electrochemical sensing technology, as well as an ionization sensor for smoke detection. The detector has a solid 90dB alarm that tells you when there's a problem, and it's loud enough to be heard in a bedroom or hallway. The Brk SC9120B also has its own battery backup, and the unit's indicator lights will turn red when it detects smoke or carbon monoxide, and an 85dB siren will sound. The detector is easy to install, and it comes with a universal mounting bracket, so you can easily bolt it to a wall or ceiling. The alarm can be connected directly to other compatible BRK or First Alert detectors, so if one of the alarms sounds, all alarms will sound. The Brk SC9120B doesn't have a Wi-Fi or cellular connection, so you can't use it to remotely monitor your home. However, the Brk SC9120B is a better choice than our previous pick, the Nest Protect, for homes without Wi-Fi or cellular service.

The Kidde AC-Plug-In Carbon Monoxide Detector offers reliable protection for your home's occupants. It detects both toxic levels of carbon monoxide and low-oxygen conditions, which indicate fires. The alarm is loud enough to be heard throughout the home, and it uses an LED light to indicate when the unit needs recharging. The alarm's battery lasts for about 10 years, but the unit comes with a backup battery that can last for 10 years, so there's no need to replace it. The alarm's LED indicator flashes when the alarm is alerting against dangerous levels of carbon monoxide, making it easy to spot a CO leak or fire. The alarm also alerts you to low-oxygen conditions in your home, which indicate a fire. The alarm is easy to install, and it plugs directly into a standard wall outlet. The Kidde AC-Plug-In Carbon Monoxide Detector is inexpensive and easy to install, making it a good choice for families who rely on multiple alarms.

The 4 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home and Kitchen is a reliable, simple-to-use smoke detector, and it's ideal for home use, since it Alerts you to CO danger and fires with a smart combination of photoelectric and electrochemical sensors. It also minimizes false alarms with a smart silence feature, which detects smoke but doesn't trigger an alarm if the air is clean. The detector's advanced smoke-detection algorithm also distinguishes between normal smoke and smoldering fires, so you won't have to worry about false alarms caused by slow-burning fires that are common with candles. The detector is equipped with an LED light and a loud siren, and it's loud enough to cut through background noise. However, the detector's battery life is only 4 years, so you'll need to replace it every so often.

The X-Sense CO03D CO alarm is a reliable detector that stays on overnight and accurately detects CO levels up to 300 parts per million (ppm). Its simple, easy-to-use interface and long battery life make it an excellent starter CO alarm, and its 10-year sensor life makes it easy to replace batteries as needed. The X-Sense's LCD screen and buttons are large and responsive, making it easy to use even in the dark. The alarm's beeps are loud, and the volume can be adjusted as needed. The microphone is sensitive enough to detect CO from across the room, and its CO sensor is more durable than those used in other CO alarms. The sensor performed well in our tests, detecting a CO leak within 10 seconds. The alarm's alarms are loud enough to wake you up, and its flashing red LED is clearly visible from across the room. The alarm's low battery warning lets you know when the batteries need to be changed, and it's backed up by a 60-day money-back guarantee and a 5-year warranty. The X-Sense's display doesn't light up at night, which can cause confusion and make it difficult for some users to know which button to push. The alarm's sensitivity setting, which determines how quickly it alerts you to CO levels, is confusing and can't be adjusted. The alarm's audible alarm is only 85 decibels, which is loud enough to be heard from across the room, but could be loud enough to annoy others. The alarm's beeping is loud enough to bother some sleepers, and the alarm's volume can't be adjusted. The alarm's quick-release latch, which makes it easy to replace the batteries, is frustratingly small, and can be difficult to open.

The X-Sense Carbon Monoxide Alarm is versatile, reliable, and easy to use. It's pared-down and easy to use, yet it's still packed with features that set it apart. It's battery-powered, which is fine, but it's important to note that it's battery-operated only, so it's never good for long-term use. It's also not replaceable or rechargeable. The alarm is loud, with a piercing 85-decibel alarm that can be heard throughout the home. The detector is also highly sensitive, and is capable of detecting CO leaks as low as 30 PPM; we tested it with a 5 PPM CO leak and the alarm sounded. The detector also has two silence modes, which allow you to silence the alarm when it goes off, and to silence it when it detects a malfunction. The detector is small, but it can sit on a shelf or hang on the wall. The 6-inch-long detector is easy to pick up, and it has a clip on the back for hanging, so you can place it where you need it. The detector is Wi-Fi enabled, so it can connect to your home network and communicate with your smartphone, so you can use it as a remote. The detector is battery operated, so it's portable, but it's small and light enough to pack for travel. The detector comes with a one-year warranty.

The Ecoey carbon monoxide detector offers solid performance, but it's a little pricey. Its alarm is loud enough for sleeping, but it's a bit loud for quiet environments such as offices. The beeping alarm also sounds a little off, and it's somewhat annoying. The alarm is sensitive enough to detect the lightest levels of CO, and it's accurate. The detector also warns you when it has a low battery. The detector is slightly bulky, and it's relatively heavy, but it's fairly small and compact. The detector runs on 2 AA batteries, and it comes with 2 batteries. The detector is easy to set up, and it comes with detailed instructions.

The NGPOPX carbon monoxide detector is one of the simplest, most reliable and accurate CO detectors we tested. The digital display is clear and easy to read, and the unit is compact and light enough to install almost anywhere. The alarm sounds when a CO level is detected, and the unit has a simple test / silence button, and a powered-on indicator light. The alarm can be set to sound even if the unit is unplugged, so you don't need to be home to prevent it from sounding. The alarm is loud enough to be heard in a normal-sized room, and its 90-decibel siren provides a clear, loud warning. The unit is battery powered, but it's powered by a long-life rechargeable lithium battery, so there's no need to change batteries. The unit isn't Wireless, however, so you'll need an extension cord to use it. The alarm has a maximum detection range of 10 to 15 square meters, but its effective range is probably smaller, depending on the room's size. The alarm is best suited for rooms where there's a lot foot traffic, but it shouldn't detect outdoor CO levels. The alarm is powered by AA batteries, which are included, and the alarm has three levels of sensitivity, so it should detect levels of CO as low as 0.1 parts per million. The alarm can also detect other types of gas, but carbon monoxide levels are usually the only danger.

The Smoke and Carbon Monoxide Detector Combo with Sound Warning and LCD Display is easy to set up and use. The CO and smoke detector combo can easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs, No hardwired need. The smoke detector used photoelectric smoke sensor that detects the larger particles of a smoldering fires. The detector is highly sensitive and quick response. The Smoke and Carbon Monoxide Detector Combo with Sound Warning and LCD Display offers the ultimate protection from two deadly threats and make your home decoration look more concise. The warning beeps sound for 10 seconds, if the smoke or CO concentration reaches 400ppm, the detector will alarm for 10 seconds, and the alarm indicator will flash. The Smoke and Carbon Monoxide Detector Combo with Sound Warning and LCD Display is battery powered, It uses 3 AAA batteries (not included), just replace the batteries every 1-2 years.

The X-Sense Carbon Monoxide Detector Alarm with Digital LCD Display, 10-Year Battery Operated CO Alarm Detector with Peak Value Memory, XC01 is a powerful, compact, and user-friendly detector that accurately detects dangerous CO levels. It has a peak-value memory that remembers dangerous CO levels for the last 24 hours, and it has a loud 85-decibel alarm that alerts you of dangerous levels. The detector is also designed to be user-friendly. It has a 3-color LED indicator that flashes red, green, or yellow to indicate an alarm, power, or a malfunction, and in addition to real-time CO levels, the detector displays the current time, a 10-year battery life, and the date and time of calibration. The detector is also equipped with an extraction tube that conveniently lets you test CO levels in your home. The detector is battery operated, and it is powered by a sealed lithium battery that is guaranteed to last 10 years. The detector is also easy to install, and it comes with a mounting bracket and screws, so you can easily mount the detector on your wall. The detector measures 4.6 x 5.7 x 1.8 inches, and it weighs 1 pound. The detector has a one-year warranty, and it comes packaged in an easy-to-open package with a user manual.