The 10 Best CO2 level Detectors (2023 reviews)

We consider a co2 level detector to be a worthy investment in the long run. We are here to help you choose the right one for your needs from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: First Alert CO2 level Detector READ REVIEW

Best For locating propane Leak: Buy: Klein tools CO2 level Detector READ REVIEW

Best For elderly: Buy: Google CO2 level Detector READ REVIEW

Best For Water tank: Buy: Kidde CO2 level Detector READ REVIEW

Best For general aviation Pilots: Buy: FORENSICS Detectors FD CO2 level Detector READ REVIEW

Best For Carbon Monoxide Detector: Buy: Xsense CO2 level Detector READ REVIEW

Best For Water heater: Buy: lunarlipes CO2 level Detector READ REVIEW

Best For HVAC: Buy: Cheffort CO2 level Detector READ REVIEW

Best solid Product: Buy: Aegislink CO2 level Detector READ REVIEW

Best Easy To Read: Buy: ACEGMET CO2 level Detector READ REVIEW

Best Overall: First Alert CO2 level Detector

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The first alert co2 level detector is capable of outshining several other detector featured in this list in overall features. The temperature readout and lighted display (when the button is pressed briefly) is a very nice addition. It can be mounted to a wall, or placed on a flat surface. It includes it mounts with two screws which can learn how it sounds. It is designed for marine or rv use.

The temperature gauge is great, and it’s easy to install and use. It is ideal to pack in any size bag. There's a self test button on the top, so you can learn how it sounds. The sealed battery is safe to pack when traveling by plane. It is easy to install with the supplied hardware.

• Super easy, thermostat is a nice bonus
• Looks good, tests good, has a digital temperature display
• Strong plastic exterior with easy to read window

Best For locating propane Leak: Klein tools CO2 level Detector

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We would, of course, be remiss if we didn't mention klein tools co2 level detector for daily purpose. This is a "Combustible Gas" leak detector. It measures combustible gases and pathogens that the fire department’s detector is incapable of detecting. It is great for locating propane leak on the rv. The five-level display makes it easy to zero in on the source of the leak. It picks up the gas just fine, with all indicator lights turning on to warn of high gas levels. It does detect methane pre combustion. The case could also be more rugged. It is easy to use and much cheaper than a professional leak detector.

• Detects linger for some time before total absence
• You can turn off the beeps with the mute button
• One of the new comers and featured product

Best For elderly: Google CO2 level Detector

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The google co2 level detector's material feels more premium than its price would suggest. Not only will you hear nest audibly, it will also alert your phone. It works great and adds an extra level of security and comfort knowing you can see the status of your alarms from anywhere in the world. It comes with some very high tech features at no additional cost including alarm and status alerts to your smart phone, the ability to silence false alarms from a smart phone, very cool visual and spoken status indicators and periodic SW updates over wifi. The light ring glows green when you turn out the lights to let you know everything’s working well.

The setup is easy and painless, especially with an existing Nest thermostat. It really does give you peace of mind knowing that you will be informed if there are any emergencies at your home. The unit can detect how much smoke is in the room, and gives you the option to silence from your phone/tablet.

• Excellent and easy to physically install
• Voice notifications are loud and clear
• Sophisticated, good quality fire and co detector
• Easy to use and will last a long long while

Best For Water tank: Kidde CO2 level Detector

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Not everyone likes to purchase detector for their daily purpose, but the kidde co2 level detector would be an anomoly. This unit is well built. It covers even more explosive gases than it claims on the package. It has to be plugged in for long time use with a battery backup only for short term power outages. The internal clock runs even if you remove the battery and unplug the unit. This unit also includes a co alarm and it can be easily mounted in multiple positions / situations.

This is an upgraded unit with combustible gas alarm as well as CO. The packaging says that it might take up to 4 hours to sound depending on the concentration of CO, this is consistent with the UL standard. It looks good and very well made.

• Installation is easy, just plug it in
• Accurate and sensitive when the electricity is on
• One of the new comers and featured product

Best For general aviation Pilots: FORENSICS Detectors FD CO2 level Detector

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The forensics detectors fd co2 level detector should be able to handle its purpose and duties with ease. This low level CO detector is small, compact and great for travel. It offers sensitive carbon monoxide detectors and meters for transport, airplane, vehicle, home, and industrial uses. It includes a co detector with 2xcr2032 batteries installed, plastic sleeve mount and clear instructions in english. It is very easy to use, with only one button and a nice feature set for detecting CO in a vehicle, and works right away out of the box.

It is perfect as a no hassle low level co alarm. Its Small, modern aluminum alloy body gives a real "metal finish" high quality touch, lightweight (2oz) and comes with a robust case and a 3M stick-on mount option.

• Perfect for use in private aircraft
• Great concept, super easy to install and use
• Has three preset range that give you an alert if the level of
• Highly recommended for fleet vehicles to protect employees and have peace of mind

Best For Carbon Monoxide Detector: Xsense CO2 level Detector

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The xsense co2 level detector is suitable and reliable and fits well with your daily purpose. One of the coolest features, along with its ten year battery in this model, is the test and alarm silence button. It is a handsome device, with a sleek modern appearance. It is easy to pair with other x-sense detectors so if one alarm goes off they all go off. The combination will alarm for both smoke and excess carbon monoxide. The huge vent hole on the body is very comforting.

They have a nice big test/silence button you can easily hit. In the standby mode, the LED indicator will flash green once every 60 seconds, indicating it is functioning properly.

• Is easy to use and it sounds loudly
• Ease of testing and ease of mounting
• You can connect up to 24 x-sense link+ wireless interconnected alarms

Best For Water heater: lunarlipes CO2 level Detector

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We would, of course, be remiss if we didn't mention lunarlipes co2 level detector for daily purpose. This portable CO gas monitor can freely set the concentration of the alarm value. It is preset at either 20 or 25 ppm and is adjustable. The high-definition LCD backlit screen allows you to use it easily even in harsh environments such as night and darkness. It is pretty intuitive to use and the instructions explain how to change settings.

The high-precision carbon monoxide detector has an automatic calibration function. If the co gas concentration reaches the alarm level, the sound and light alarm will work. It is for very sensitive mintoring of co levels, you won't find a better value. This one is handheld with specific controls to monitor CO and as a bonus, temperature.

• Handheld portability makes checking different areas easy
• Economical way to test your furnace for carbon monoxide
• Air tester for carbon monoxide and temperature

Best For HVAC: Cheffort CO2 level Detector

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The cheffort co2 level detector is satisfactory and appropriate and fits well with your regular usage. The CO gas meter is compact and lightweight, professional designed to fit comfortable in your palm,easy to carry and operate. It detects only when it is turned on. It can sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave. It is easy to read and loud alarm sounds when numbers are off. You can set it in max hold mode, which causes the unit to only update if a reading is higher than the last displayed reading. There is a HOLD mode to just keep the current displayed value on-screen, such as if you want to record the value in a logbook. It is good for checking vent pipes and heat exchangers.

• A good tool to keep you safe
• Good brand reputation

Best solid Product: Aegislink CO2 level Detector

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The aegislink co2 level detector's superior materials makes sure that it ages well with use. This combination smoke and carbon monoxide alarm features photoelectric and electrochemical sensors that detect smoke and carbon monoxide, giving you and your family dual protection. The SC-RF220 is an RF interconnected alarm and does not have to be connected to Wi-Fi. The carbon monoxide is slightly lighter than air, and will diffuse throughout the room evenly over time, depending on airflow.

This unit can only detect smoke and carbon monoxide. The test button only tests each smoke detector at a time. It is easy to read carbon monoxide rating and alarm is fantastic. It is great that this is not only a smoke detector but a carbon monoxide detector as well.

• Great carmon monoxide/fire alams, easy to install
• Three smoke and carbon monoxide detectors
• Great for every house, camper, rv, or office

Best Easy To Read: ACEGMET CO2 level Detector

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The acegmet co2 level detector's material feels more premium than its price would suggest. This machine is normally used in confined spaces and has alarms when it detects dangers. It has not detected leaks from the gas lines. The gas sniffer or gas leak detector is placed with a belt clip to connect to clothing when inspecting, working and assessing a confined space. It keeps you safe at all times.

This not only has big light and the alarm on it, but it also has the vibration alert. It has a decent rate of fire. It is a nice safety device to be used for what it is intended for. This is a good tool to have for an inspector or tradesman.

• Gives audible warnings, understandable and clear
• Delivers what they promise