Best Carbon Monoxide Detectors


Over the years we’ve grown used to the presence of smoke alarms in most homes and businesses. They’re ubiquitous and reassuring and have a proven safety track record. Carbon monoxide alarms (CO), on the other hand, are relatively new to the home market. More and more people are becoming aware of what a crucial role they can play in terms of home safety. They are vital in protecting us from deadly poisonous gases that are both odourless and invisible, and because of this it is universally agreed that every home should have at least one installed. 

However, not as much is known about carbon monoxide detectors. They are a more recent addition to the market than smoke detectors. What’s more, as more become available on the market, it can be difficult for anyone without expert knowledge to get their heads around the technical specifications of the multitude of models available. So, we’ve tried to put together a list of the seven top carbon monoxide models available on the market right now.

Kidde 5CO 10 Year Life LED Carbon Monoxide Detector

The Kidde 5CO detects carbon monoxide gas and gives a loud acoustic warning if this poisonous by-product of incomplete fossil fuel burning is present. It’s important to note that this is just a CO detector/alarm, and not a combination of CO and smoke detector/alarm. Nevertheless, it is an essential lifesaver that every home with gas or solid fuel heating needs. Excellent customer reviews across all platforms and scores highly in terms of efficiency and value for money.

Talking about the design details, it is great to know that it will monitor CO2 24/7 365 days a year. In addition to that, it is a convenient product that can be installed near almost any CO2 source including boilers and stoves. It operates on AA batteries and will trigger an alarm once the battery life is about to drain. The interface of this CO2 detector is newbie-friendly and comes down to monitoring the activity via the green and red LED display. To top that off, it comes with a 10-year limited warranty that is perfect if you are worrying about built-in defects. The only issue is that the batteries are not easy to replace especially if you’ve removed the tab.

Features:

  • Continuous monitoring
  • Can be positioned in all rooms with boilers, stoves, or open fires
  • End-of-life alarm
  • Test/reset button
  • Battery operation
  • Multifunction green and red LED display
  • Early warning alarm to protect against the first signs of carbon monoxide build-up
  • Alarm sounds and lights flash before dangerous levels of CO are reached in the room
  • 10-year sensor life span
  • 10-year replacement guarantee if faulty

Pros

  • The warning signal for high levels of CO2
  • Newbie friendly with a simple installation process
  • Comes with a 10-year warranty for built-in defects
  • Powered by two AA batteries
  • Can be placed near any CO2 source

Cons

  • Batteries aren’t that simple to replace after tab removal

Check price at Amazon

Fireangel C0-9D Digital Sealed-for-life Carbon Monoxide Alarm

The Fireangel CO-9D digital 7-year life carbon monoxide alarm provides an early warning of the presence of CO in your home. The digital LCD display shows low levels of CO down to 10ppm and peak readings over the previous 4 weeks. Excellent customer reviews across all platforms and scores highly in terms of efficiency and value for money.

Offers continious CO2 monitoring no matter even when there is a power outage. Highlighted by a photoelectric sensor that is set to detect fire and high levels of CO2 near the source. Pretty simple to install and operates on long battery life. Most importantly? You don’t need an electrician to set this product up. It is great to know that the battery can be replaced without removing the alarm making this product newbie-friendly and minimizing the risk of faulty appliances. The only issue? The alarm could be louder. 

Features:

  • 7 year sealed-for-life lithium battery
  • Portable appliance so can removed from the home to use on holidays.
  • Can be positioned in all rooms; bedrooms, living rooms, kitchens, boiler rooms
  • Ease of installation
  • Room thermometer function designed to provide temperature indication
  • Certified to BS EN50291-1:2010+A12012 & BS EN50291-2:2010

Pros

  • Highlighted by a 7-year limited warranty
  • Can be installed near almost any CO2 source
  • Newbie-friendly with an easy battery replacement
  • Comes with an accurate photoelectric sensor
  • Offers continious monitoring even when there is an outage

Cons

  • The alarm should be louder

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Google Nest Protect

Nest Protect is a combined smoke and carbon monoxide alarm with a split-spectrum smoke sensor to detect both fast -and slow-burning fires. It can send an alert to your phone, speak to you, and even light the way in the dark. It tells you what the danger is and where it is. The Split-Spectrum Sensor looks for both fast-and slow-burning fires.  Google Nest Protect has garnered excellent all-round reviews for both its specifications and efficiency. However, it is considerably more expensive than the other carbon monoxide alarms on offer – though you also get an added smoke alarm for the price.

One of the coolest points about this product is that instead of a buzzing alarm it alerts you in a pre-recorded human voice if there are high levels of CO2 or fire on going in your house. In addition to that, it is the Spectrum Sensor that plays an essential role in detecting the source of the ongoing threat. 

We were pretty happy that the app Google Nest Protect can be connected to sends notifications and alerts in a matter of seconds. Thus, if you are outside of your property you are still to know if something went wrong. Also, you can use this app to silence the alarm in case the levels of smoke don’t present any danger but are rather a normal phenomenon while you are in the kitchen. The main downside? The fact that the installation is pretty complex and takes over 60 minutes.

Features:

  • Nest Protect has a 10-year CO sensor so that it can tell you where poisonous, invisible CO is hiding.
  • Nest Protect can alert your phone when you’re out and about that if something is wrong at home. You’ll receive a message if the alarm goes off if the batteries start to run low or if a sensor isn’t working. And you can silence your Nest Protect using the Nest app
  • Nest Protect checks itself over 400 times a day and lets you know if something is wrong.
  • Nest Protect also has Steam Check, so hot steam from baths and showers shouldn’t trigger false alarms. Pathlight will light your way at night
  • Easy to install. Nest Protect only takes minutes to set up with your iOS or Android device. Once you’ve added each of your Nest Protects to your Nest account, they will automatically connect to each other. Nest Protect is also simple to attach to the ceiling, thanks to a neatly designed back plate.

Pros

  • Comes with a 10-year warranty on all manufacturer defects
  • Human voice alarming you on levels of smoke or CO2 
  • Simple to connect with an iOS or Android app 
  • You can adjust the alarm volume and silence it in case of low smoke levels
  • Highlighted by a sophisticated construction

Cons

  • Pretty tricky to install (takes over 60 minutes)

Check price at Amazon

YZIF Carbon Monoxide CO Alarm Detector

YZIF Carbon Monoxide Detector CO Alarm Detector battery-powered with digital display and sound alarm for home use. Easy to install, very good competitive price and well regarded by buyers online. Good value for money considering the specification.

While it comes in White-only, this CO2 and fire detector is pretty sophisticated. The highlighting feature is the sounding alarm that is set at 85 decibels once it detects higher levels of CO2 or smoke. Most importantly, you can adjust and lower the volume in case it was triggered by smoke that is not endangering your family or your property. It is made out of ABS and should withstand years of heavy use especially given the two AA batteries that it operates on and that is pretty simple to replace.

Talking about the sensor, it uses a Certified Carbon Monoxide detector that can be installed near any CO2 source. It is easy to install and comes with a readable LCD. The only issue? The test function has some glitches.

Features:

  • Light and Sound Alarm Warning: When a dangerous level of carbon monoxide is detected the red LED will flash and the alarm pattern will sound 85-decibel alarm to protect your family’s life and property safety from CO detector.
  • Alarm Standard: the alert time depend s on the level of carbon monoxide concentration. 50ppm, alert within 60 to 90 minutes; 100ppm, alert within 10 to 40 minutes; 300ppm, alert within 3 minutes.
  • High Quality CO Alarm, EN 50291 Certified Carbon Monoxide detector equipped with high accuracy and reliable long-life electrochemical CO sensor to detect CO gas leak quickly
  • Power Supply: (DC3V) 2AA size batteries. (Not included) Sensor Type: Electrochemical Gas Detection Type: Carbon Monoxide Material: ABS

Pros

  • Comes at an affordable price
  • Made out of ABS plastic and with sealed two AA batteries
  • Simple to install near the CO2 source
  • Readable LCD with a red and green indicator
  • Triggers a sounding alarm at 85 decibels

Cons

  • The test feature is glitchy

Firehawk CO7B-10Y Carbon Monoxide Alarm Detector with 10-year battery

Firehawk CO7B-10Y Carbon monoxide alarm. Battery operated. Sealed-in long life lithium battery. 10 Year sensor. Automatic sensor test. End of life indicator. Alarm silence. Excellent reviews overall for this cost-effective CO alarm. Easy to install, easy to use and with good battery life. Great value for money considering its technical specification and performance. The only criticism is once the batteries are spent, the device needs to be replaced, rather than just the batteries.

Features:

  • Sealed 10-year Lithium battery
  • End of life indicator
  • LED indicators
  • Versatile mounting system
  • Compact & stylish design

Pros

  • Comes at an affordable price
  • Made out of ABS plastic and with sealed two AA batteries
  • Simple to install near the CO2 source
  • Readable LCD with a red and green indicator
  • Triggers a sounding alarm at 85 decibels

Cons

  • The test feature is glitchy

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Honeywell XC70 Carbon Monoxide Detector Alarm – BNIB 7

The Honeywell XC70 has an attractive, compact design and can be used as a free standing or wall mounted unit according to your requirements. The XC70 has a reduced sound level test feature, allowing you to test the detector without the full 90dB alarm sound level. Certified for use in caravans and boats as well as domestic applications, the Honeywell XC70 carbon monoxide detector features a sealed long-life lithium battery, giving the detector a lifespan of up to 7 years. Generally, receives good customer reviews for efficiency, specification, and competitive pricing.

Most importantly, it offers a sensitive CO2 detector and sounds like a loud alarm that you can’t ignore. Our issue? The fact that the installation instructions aren’t that clear. Still, if you’ve had previous experience with CO2 detectors the setup shouldn’t be a problem.

Features:

  • Up to 7-year lifespan and manufacturer warranty
  • Battery powered – sealed lithium long-life battery. 90db alarm
  • Certified for use in caravans, on boats and domestic applications
  • Separate coloured status LEDs for alarm, power, fault and ventilate
  • Suitable for free standing or wall mounting

Pros

  • Comes with a 90-decibel alarm
  • Can be mounted on a wall or set in a vertical position on a shelf
  • Highlighted by a long-battery life
  • Comes with a 7-year warranty on all manufacturer defects
  • With a readable display featuring red and green indicators

Cons

  • Installation features aren’t that clear

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Fireangel C0-9X Carbon Monoxide Alarm

Compact and portable carbon monoxide alarm; provides early warning of the presence of CO through the alarm and LED display.  Advanced electrochemical sensor with a loud, clear alarm. A large test button and end-of-life alert. Wall-mountable or portable for home or travel. 7-year sealed-for-life battery. Excellent reviews for price, specification, and reliability. The only complaint, as is the case for many sealed-for-life battery models, is that once the batteries are exhausted the alarm becomes redundant, though for the relatively small initial outlay perhaps this isn’t too much of an issue after a 7-year life cycle.

It is perfect for people who are on a limited budget but don’t want to miss out on the CO2 detector. It offers a large test and silence button allowing you to have full control over the operation of this product. The main downside? It isn’t as easy to wire in.

Features:

  • Automatic self-diagnostic check, 7 years sealed for life lithium battery, loud 85 dB alarm at 1 meter, large test and silence button, visual LEDs for power, alarm, and fault
  • 7 years sealed-for-life lithium battery
  • Loud 85 dB alarm at 1 m
  • Large test and silence button
  • Visual LEDs for power, alarm, along battery fault

Pros

  • Comes with an automatic self-diagnostics
  • Highlighted by a long battery life of up to 7 years
  • With a sophisticated test and silence feature
  • The sounding alarm of up to 85 decibels
  • Comes at a great price

Cons

  • Not that simple to install

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Scondaor Carbon Monoxide Alarm Detector EN50291 Certified

The Scondaor Carbon Monoxide Detector is a battery-powered LCD Display CO alarm featuring a durable and high-quality CO sensor can provide 10 years long time protection for you and your family. After 10 years operation, the alarm beeps twice every 45 seconds and LCD display “End” indicating it is time to replace the detector. Generally received good reviews for pricing and efficiency, though the build-quality can sometimes be hit and miss. Most customers seem to be pleased with the CO alarm, baring initial teething problems. The only issue? The fact that it doesn’t seem to register lower levels of CO2. 

Features:

  • EN 50291 Certified Carbon Monoxide Detector: High accuracy and reliable long life electrochemical CO sensor and the CO alarm detector complies with EN 50291 standard.
  • Sound 85dB audible alarm and Red LED flashes when dangerous level CO gas is detected to alert home members effectively
  • Large Digital LCD Screen: Display CO concentration PPM Level and Battery status. And three LED indicators display three working statuses: Red (Alarm mode), Yellow (Fault mode), Green (Power On, Normal Standby mode)
  • TEST/MENU Button: Press “Test” to manual test the CO alarm circuit operation to ensure the proper working and Press “MENU” to view the alarm record. The alarm features self-test function automatic detect hardware failures such as internal circuit and CO sensor in normal standby mode to ensure the alarm always proper operating
  • 3×1.5V AA Battery operated (Battery Not included). Alarm features Low Battery warning to alert users to replace the batteries. Alarm features End of Life warning to alert user to replace the alarm after 10-year operation
  • Widely Used: Carbon monoxide alarm detector can be wall-mounted or free-standing- the best choice for home or travel

Pros

  • It is newbie-friendly with a simple installation process
  • Highlighted by a readable LCD
  • Long battery life of up to 10 years
  • Can be installed near any CO2 source

Cons

  • Doesn’t detect low CO2 levels

Buy it on Amazon

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