5 Best CO2 Monitor For Home Use

The benefit of a CO2 monitor, although it is not fully understood by experts, is that it serves as a way to provide actionable information. It is observed that CO2 monitors are usually used for personal use, for monitoring the presence of Carbon Dioxide (CO2) levels in your home or office. It also comes with other sensors that help in providing information on different factors such as temperature and humidity. Aside from the health benefits that people believe it can give us, CO2 monitoring can also make more people aware of their exposure risks when they are in places where hazardous chemicals are present. Today you’ll find a lot of options online when it comes to purchasing a CO2 monitor. It makes choosing one with its many variants quite difficult. It isn’t something that you could buy out of impulse so it is important to carefully weigh each option before buying one.

5 Best CO2 Monitor Reviews

1. Airthings 2930 Wave Plus – Radon & Air Quality Monitor

Airthings 2930 Wave Plus - Radon & Air Quality Monitor (CO2, VOC, Humidity, Temp, Pressure)

Buy on Amazon

Airthings 2930 Wave Plus is the smart wave-to-web connected Air Quality sensor with an integrated transmitter. It continuously monitors indoor radon levels and is a full-featured indoor air quality monitor with CO2, VOC, humidity and temperature sensors. With a customisable smartphone application you can receive notifications about air quality issues in real time. The built-in Bluetooth radio gives you the ability to transmit data to the cloud by using their free SensorPush software available for both iOS and Android smartphones.

Clean Air Sensor

The CleanAir sensor suite consists of six key indoor air sensors that allow you to gain full visibility into six key indoor air factors including Radon, CO2, VOCs and more. The CleanAir sensors are easy to install and can be managed via the CleanAir app for iOS or Android.

Easy And Clear Results

The Airthings Wave is a smart air monitor that gives you immediate and accurate insights into the air quality in your home. Connect via Bluetooth to the Airthings App or log in to the Airthings Dashboard online for detailed insights into your air quality. It is simple to use, and you can even share your insights with friends and family.

Radon Levels

As radon levels fluctuate daily, continuous long-term measuring is necessary. Airthings Wave Plus measures radon accurately and reliably. It sends radon measurements to the Airthings app every two minutes, allowing you to track your home’s changes over time in a simple visual format.

Pollen Levels

The Airthings App has live pollen data in your neighborhood, so you can track the pollen levels on your way home from work or school. The pollen readings are updated daily and come from the nearest weather station.

2. Hydrofarm APCEM2 Autopilot Desktop CO2 Monitor

Hydrofarm APCEM2 Autopilot Desktop CO2 Monitor & Data Logger, Data, White/Blue

Buy on Amazon

As a gardener who wants to maintain healthy plants and reduce the risk of plant diseases, you’ll want to keep an eye on your greenhouse CO2 levels. The Hydrofarm APCEM2 Autopilot Desktop CO2 Monitor & Data Logger provides you with the tools and data needed to maintain high CO2 levels in any growing environment. This digital precision instrument features an audio-visual display, memory storage, high level CO2 detection and a 12-month calendar display. The Hydrofarm APCEM2 is ideal for any growing or laboratory environment looking to control and monitor greenhouse gas pressure.


The Memory Digital Weather Station by AcuRite features a digital memory chart that shows and records daily, weekly, monthly and year-to-date weather stats over an adjustable 24 hour or 7-day period. The digital trend chart displays variables including minimum/hourly/daily and weekly temperature readings, in addition to relative humidity levels.

Carbon Dioxide Meter

The Autopilot APCEM2 Desktop CO2 Monitor and Data Logger is designed to monitor carbon dioxide, relative humidity, and temperature of your grow room or greenhouse on a clear LED screen. This digital device comes with four sensors that can be placed in different areas of your garden allowing you to monitor CO2 levels in multiple locations. The data logger stores up to 24 hours of information on four separate channels.

Operating Temperatures

32 to 122 degrees F (0 to 50 degrees C); Storage Temperature: -4 to 158 degrees F (-20 to 70 degrees C). Operating and storage RH: 0% to 95%, non condensing.


Designed with a hook-and-loop fastener along the back for multiple hanging options, which can be attached to an external battery pack (the battery pack is not included); The green power supply is suitable for use with a regular charger for a smartphone; Dimensions (L x W x D): 4.7 x 3.6 x 1.1 inches.

3. SAF Aranet4 Home: Wireless Indoor Air Quality Monitor

SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Home, Office or School [CO2, Temperature, Humidity and More] Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History

Buy on Amazon

SAF Aranet4 is a wireless indoor air quality monitor for home, office or school, very good to use in children’s rooms. The air quality monitor reports the room air quality with CO2, temperature and humidity. It’s also a smart networking device which can find surrounding wireless networks. It shows the wireless network SSID and signal strength on the e-ink display (can be hidden when it is not in use). You can connect it to your wifi network and you don’t need to install any software, just configure it via a simple app on the phone.

Indoor Air Quality

Indoor air quality (IAQ) is an increasingly important issue for many residential and commercial environments. AQM100 precisely monitors indoor air quality – CO2, Temperature, Relative Humidity and Atmospheric pressure in real-time. Free web app allows you to monitor up to 10 locations with a simple internet browser.

Visual and Sound

Visual and Sound Alerts when CO2 concentration gets too high. The CO2 sensor has a range of 300–10,000 ppm. When the CO2 concentration rises above 1000 ppm, an alarm will sound and a red LED will light up on the monitor. At concentrations over 2000 ppm, the audible alarm will increase in frequency and finally become constant.

Smartphone App 

They have made a smartphone app called “History” just for you. A graph of the temperature, air pressure, and wind speeds that were measured over the course of several days can be viewed using this application, which provides a visual representation of the trend of these numbers. The app is compatible with Bluetooth 4.1 or later on iOS, Android, Windows Phone 10 or later devices and tablets.

E-Ink display

This device makes use of a power-efficient E-Ink display, which is not only easy on the eyes but also permits an exceptionally extended battery life. The display is made to reflect light, which makes it easier to view even when the sun is directly overhead.

4. CO2Meter RAD-0501 Day Night CO2 Monitor and Controller

CO2Meter RAD-0501 Day Night CO2 Monitor and Controller for Greenhouses, Grey

Buy on Amazon

The CO2 Meter RAD-0501 Day Night CO 2 Monitor and Controller is specially designed for the greenhouse industry. It is digitized to measure both day and night CO 2 . This monitor and controller will automatically produce a 6-7 ppm increase during the day to enhance plant growth and night drop of 4-5 ppm to protect plants from harmful effects of excess carbon dioxide. To obtain optimum results, it should be placed in the greenhouse for 24 hours when starting up a new operation.

Built-In light Sensor

This aquarium control unit fits most sized aquariums. It includes state-of-the-art technologies like an accurate built-in light sensor for automatic CO2 shutoff and a whisper quiet cooling fan that turns on with the lights to create a healthy environment for your fish. The digital display makes it easy to manage the temperature and air flow in your tank.

Piggy back Plug

Piggy back plug allows for control of CO2 generator or tank with electronic regulator to prevent overfilling and help regulate CO2 levels in planted tanks. Piggy back plug can also be used to directly connect CO2 generators or tanks to other submersible style pumps or tubing systems, making it versatile and easy to install.

Accurately Controls

Accurately controls CO2 levels in greenhouses or grow rooms. This is the data logger that accurately monitors and displays greenhouse CO2 drops and rises as plants in a greenhouse respire. After connecting it to a CO2 generator, pump or other CO2 source using the flow transmitter, install it in the greenhouse away from drafts and heat sources.

Easiest CO2 Controller

The Easiest CO2 controller to use in the industry. The controller automatically adjusts CO2 level according to altitude and temperature, saves you money and guarantees better results. When using their CO2 controller and a peristaltic pump, you don’t need a tank and can save 50% on CO2 costs while still achieving excellent results.

5. Indoor Air Quality 9999ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor IAQ CO2 Monitor

Indoor Air Quality 9999ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor IAQ CO2 Monitor WB DP Tester

Buy on Amazon

The Indoor Air Quality 9999ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor IAQ CO2 Monitor WB DP Tester is specially designed to measure the indoor environmental quality and health of offices. The monitor uses non-dispersive infrared (NDIR) sensor technology which makes it possible to monitor carbon dioxide (CO2) level, temperature, relative humidity and process data, etc. Meanwhile, the Indoor Air Quality 9999ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor IAQ CO2 Monitor WB DP Tester can check real-time CO2 level to help you adjust your plants’ growing environment, making it a handy tool in your greenhouses.

Triple Displays

This CO2 Monitor / Humidity and Temperature Logger will help you maintain a healthy environment for your reptiles. Easy to use, this monitor provides three different displays: tri-level CO2 level display, temperature (°F/°C) display, humidity (Air, Wet Bulb, or Dew Point). With the triple display feature you can keep track of all three levels at once.

Stable NDIR CO2 Sensor

The Stable NDIR CO2 sensor is an ideal indoor air quality meter for homeowners, laboratories, hotels, and other applications that require stable CO2 readings. An NDIR (non-dispersive infrared) sensor provides a stable CO2 reading over an extended period of time without the need of recalibration.

Warning Alarm

Sound Warning Alarm notifies the operator when CO2 levels reach or exceed a preset threshold. Throughout the years, SCBA has proven to be a reliable source of compressed air while being simple to operate and easy to maintain. As a result, Sound Warning Alarm was developed to provide early warning notification of CO2 bank exhaustion.

Power supplied by Battery

Power supplied by Battery or 9V adapter. Optional Software CD for PC connection is also possible. Power and recording are both available on demand. Online logging is also possible and can be monitored from your PC or Smartphone.

What To Consider When Buying A Best CO2 Monitor

Best CO2 Monitor

When buying a CO2 monitor, it is important to know what you are looking for. There are many factors to consider when purchasing one of these devices and it is important that you find the one that best suits your needs.


Why do you need the CO2 monitor? If you want to know if your aquarium has an adequate amount of CO2, the best option is to buy a cheap but reliable CO2 monitor that can give you accurate readings. If you want to track how much CO2 is being emitted from your aquarium, then you should get a more expensive one that can record the data for long periods of time.


This is also called sensitivity and refers to how precise the readings are. It’s measured with parts per million (ppm). A low ppm means better accuracy, while a high ppm indicates that there might be some error in the reading due to interference from other gasses like oxygen or nitrogen.

Response time

Another important factor when buying a CO2 monitor is response time. The response time refers to how long it takes the sensor to detect changes in CO2 levels and alert the user of what’s going on in the environment. The faster the response time, the more accurate results are going to be. Some monitors can detect changes in CO2 levels as quickly as one second while others take as long as 10 seconds or more. It all depends on how sensitive the sensor is.


The durability of the CO2 monitor is one of the most important features that you should look for in a CO2 monitor. The durability of the CO2 monitor will determine how long it will last before you have to replace it. You do not want to spend more money replacing your CO2 monitor than using it.


You also need to consider the size of your CO2 monitor before making any purchase. The size of your CO2 monitor will determine how much space it would take up on your tank or aquarium. You do not want a big bulky CO2 sensor device that can take up too much space and make your tank look cluttered and messy.

Best CO2 Monitor-FAQs

How do you monitor CO2?

In order to measure carbon dioxide levels, CO2 monitors transmit infrared light through the patient’s breathing tube. Because carbon dioxide is able to absorb infrared light, the amount of light that is detected by the sensor will decrease as CO2 levels increase. The sensor is able to calculate the amount of carbon dioxide that a patient exhales as a result of this.

Are CO2 sensors accurate?

Although other measurement ranges were selectable in some cases, all of the CO2 sensors that were tested were non-dispersive infrared sensors. The default measurement range for all of the CO2 sensors was 0–2000 ppm, but this could be changed. The accuracy specifications provided by the manufacturers ranged anywhere from ±40 ppm ±3% percent of reading to ±100 ppm over a period of 5 years.

Can a phone detect CO2?

Carbon Monoxide Detection Systems can be inspected with the help of the mobile app Carbon Monoxide Detection Systems Checklist when it is run on an iPad, iPhone, Android device, or a Windows desktop computer.

How CO2 causes death?

It would appear that gaseous carbon dioxide has very little of an effect on toxicology when it is present in low concentrations. When present in higher concentrations, this substance causes a rapid increase in the rate of breathing, as well as tachycardia, cardiac arrhythmias, and a loss of consciousness. Convulsions, coma, and even death can result from concentrations higher than 10 percent.


The seriousness of the problem should serve as the primary consideration when making a final decision regarding the air quality and CO2 monitor that should be purchased for your workplace. If you and your coworkers are worried about being exposed to chemicals and toxic particles, you should absolutely go for the more professional ones. In a similar vein, in order to detect minute shifts in the surrounding conditions, a sensor with a higher level of accuracy will be required.

If, on the other hand, you want a straightforward CO2 monitor that is unobtrusive in appearance and does an excellent job of giving you accurate readings of CO2, temperature, humidity, light, and noise, there are a few options available to you.

Leave a Comment