CO2 Indoor Air Quality (in 2024)

CO2 Indoor Air Quality (in 2024)

Discover our precise CO2 monitor, designed to meet AB841 standards with a 1100 ppm alarm and max feature. This versatile product monitors indoor CO2 levels in various settings, including coffee shops, fitness gyms, restaurants, incubators, beer production, airplanes, and transport vehicles.



With direct wall 110v power, it offers plug-and-play convenience. The monitor also detects humidity, temperature, and time. Featuring an advanced NDIR sensor with 1 ppm resolution, this pre-calibrated monitor ensures high-quality CO2 monitoring right out of the box. Simply turn it on and start using it for reliable CO2 monitoring in a wide range of applications.

CO2 Monitor Comparison Chart

This CO2000 is a desktop and/or wall-mounted CO2 monitor. However, we also offer other CO2 detectors for various applications which are compared below.

CO2 Comparison Chart

CO2 Indoor Air Quality Importance

Properly monitoring carbon dioxide levels is a critical aspect of maintaining general air quality hygiene, as CO2 is exhaled along with aerosols that may carry pathogens from infected individuals.

Research conducted by the University of Colorado and Harvard School of Public Health has shown that measuring CO2 levels can serve as an indicator of indoor virus concentrations.

To minimize the risk of pathogen transmission, various government bodies, such as California State, and professional organizations like ASHRAE, recommend the monitoring of indoor CO2 air quality.

The Technical University of Berlin has also discovered that increasing the amount of uncontaminated air can help reduce indoor concentrations of CO2 and other aerosols, ultimately lowering the risk of infection. Therefore, implementing a strategy of continuous CO2 monitoring and activating measures like fresh air ventilation can be an effective way to mitigate the spread of pathogens in indoor environments.

Carbon Dioxide Monitor Wall Mount Version.

CO2 Monitor Comparison

According to independent studies conducted by Breathairsafe, their CO2 monitors exhibit outstanding accuracy performance, surpassing that of CO2 monitors that are three times more expensive.

Breathairsafe conducted a calibration experiment in which they compared the Aranet4 and Forensics Detectors CO2 Monitors in the same environment. The results showed that for the next hour, the two monitors provided almost identical measurements. While there were a few readings that showed slight variations, these deviations were well within the margin of error for both devices (± 30ppm for the Aranet and ± 50ppm for the Carbon Dioxide Monitor).

CO2 Monitor Comparison Experiment
CO2 Monitor Comparison Experiment Photograph of the CO2000 CO2 Monitor
CO2 Monitor

During the following week, Breathairsafe conducted further testing and kept both monitors on the desk to continue monitoring their readings. They noticed that the monitors consistently displayed measurements within a ten parts per million range and sometimes even showed the exact same concentration.

"I was impressed by the accuracy of the Forensics Detectors Carbon Dioxide Monitor, especially considering its lower cost."
Breathairsafe says that they are "confident in stating that the product is accurate, provided it is calibrated correctly".

CO2 Features?

  • With a focus on wall functionality, this device is designed to be a convenient addition to your home or office space. Its user interface is thoughtfully designed, ensuring a clean and easily readable display. Thanks to its size and shape, you can easily spot it from several meters away.
  • To power the device, just plug it up to a wall power socket.
  • On the front of the device, you'll notice four LEDs on the left-hand side bezel. The first LED indicates the power status, while the other three LEDs are color-coded in green, yellow, and red to provide real-time air quality status. These LEDs are particularly useful for quick glances, especially during nighttime or from a distance.
  • Unlike some other monitors, the Forensics Detectors Carbon Dioxide Monitor does not use an E-ink screen. This design choice allows for the screen to be backlit. By simply pressing a button, you can instantly illuminate the screen, enhancing visibility even in low-light conditions.

CO2 Air Circulation Vents

Having ample air vents and openings is essential for any CO2 monitor, as it enables the surrounding CO2 molecules to swiftly reach the CO2 sensor. This design mechanism directly influences the speed at which your CO2 monitor can respond and stabilize the CO2 readings, closely approximating the CO2 levels one is inhaling. Additionally, the back of the unit features the ON/OFF button.

carbon dioxide monitor

What is it Lacking?

  1. NO CO2 DATALOGGING: To keep costs down, we made the decision not to include CO2 data logging features. Our market research indicated that less than 5% of customers are interested in this feature, so we wanted to avoid burdening the remaining 95% with unnecessary costs incurred by additional memory functionality.
  2. CO2 LIVE GRAPHING: We opted not to include this feature on the front screen as it tends to clutter the display, making it complicated and distracting to read. While some may find it "novel" and "neat," we found that most users prioritize quick and easy CO2-level readings. We chose to allocate the screen real estate to larger CO2 digits for enhanced readability.
  3. NO DIGITAL COMMUNICATION: Our CO2 meter does not have Bluetooth or WiFi capability, as less than 3% of our customers expressed interest in this feature. By excluding Bluetooth and WiFi chipsets, we were able to avoid additional costs. Our focus is on providing a cost-effective solution for our customers.
  4. NO PUMP: This unit does not have a built-in pump to force air to the sensor, unlike CO2 analyzer units with a probe. Our CO2 monitor is designed as a desktop unit, providing a reliable indication of indoor CO2 levels without the need for a pump.

    Our main objective is to design an easy-to-use, functional, and affordable CO2 monitor that is accessible to everyone. We made these decisions based on customer feedback and a commitment to keeping the device practical and cost-effective.

What is the Lifetime of a CO2 NDIR Sensor and a
O2 sensor?

CO2 NDIR (Non-Dispersive Infrared) sensors stand out as robust and solid-state devices, boasting a lifespan ranging from 5 to 15 years. The IR source is the critical component, and while it may degrade or experience rare failures, such occurrences are infrequent. The impressive advancements in micromachining and miniaturization of electronic components have contributed to a significant drop in the price of NDIR sensors over the last decade, making them more accessible.

In comparison, O2 sensors belong to the electrochemical sensor category, and they differ from NDIR sensors in being non-solid-state. O2 sensors utilize ionic conduction with a mixture of electroactive solutions. However, this composition makes them more delicate, and they generally last between 2 to 3 years. The main factor leading to their degradation is time, and it's crucial to be aware that these sensors may leak acid, which can potentially corrode sensor plug connections and other electronics within the analyzer. To ensure accurate readings and maintain sensor health, regular calibration and inspection of O2 sensors are vital.

Did you know this CO2 wall mount monitor is one-of-a-kind? It was the FIRST CO2 monitor in the world to be a direct 110V plug-in version.

When do I Calibrate my CO2 Monitor?

The CO200O CO2 monitor holds its calibration for over 1 year. That being said, we recommend annual calibration which simply means taking the unit out to fresh air and selecting the calibration menu item. Once done, it takes about 5 minutes for it to calibrate.

What are Good CO2 level?

Outdoor CO2 levels in fresh air is 410ppm. However, indoors, this level increases due to human exhalation of CO2 gas.

Various agencies and organizations have put forth recommendations and requirements regarding CO2 monitoring and permissible concentration levels in different settings:

California State Assembly Bill AB841:
- Requirement: Classrooms must have CO2 monitors that trigger an alarm at 1,100 ppm.

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE):
- Recommendation: Indoor CO2 concentrations in schools should be maintained below 1,000 ppm and below 800 ppm in offices.

Washington State:
- Requirement: Restaurants must conduct CO2 monitoring and set an alarm at 450 ppm.

German Federal Environment Agency:
- Recommendation: CO2 levels in classrooms and offices should be kept below 1,000 ppm.

Occupational Safety and Health (OSHA):
- Recommended 8-hour Time-Weighted Average (TWA) exposure limit: 5,000 ppm.

National Institute for Occupational Safety and Health (NIOSH):
- Recommended 8-hour TWA exposure limit: 5,000 ppm.
- Immediately Dangerous To Life or Health (IDHL) level: 40,000 ppm.

American Conference of Governmental Industrial Hygienists (ACGIH):
- Recommended 8-hour TWA exposure limit: 5,000 ppm.
-Ceiling exposure limit (not to be exceeded) for a 10-minute period: 30,000 ppm.
- IDHL level: 40,000 ppm.

These guidelines and limits are essential for maintaining safe indoor air quality and protecting the health and well-being of occupants in various environments.


  • The significance of air quality monitoring, particularly CO2 monitoring, has increased during the COVID-19 pandemic.
  • CO2 monitors are widely utilized in various settings, such as classrooms, gyms, workplaces, and offices, to monitor and track CO2 air quality levels.
  • These monitors play a crucial role in assessing the risk of pathogen transmission indoors and are sometimes mandated for such environments.
  • CO2 monitoring is an affordable solution, with prices generally below $100, and these monitors boast a long lifespan of over 10 years.
  • It's essential to note that when CO2 levels exceed 2000 ppm, they can have physiological effects on humans, underscoring the importance of maintaining optimal indoor air quality.
  • A word of caution: It's crucial not to mistake carbon dioxide (CO2) monitoring with carbon monoxide (CO) monitoring. These are two distinct gases, each requiring its specific gas detectors for accurate monitoring and safety measures.

About The Author

Dr. Kos Galatsis ("Dr.Koz") is the President of FORENSICS DETECTORS where the company operates from the scenic Palos Verdes Peninsula in Los Angeles, California. He is a subject matter expert on gas sensor technology, gas detectors, gas meters, and gas analyzers. He has been designing, building, manufacturing, and testing toxic gas detection systems for over 20 years.

gas detector expert

Every day is a blessing for Dr. Koz. He loves to help customers solve their unique problems. Dr. Koz also loves spending time with his wife and his three children going to the beach, grilling burgers, and enjoying the outdoors.

Read more about Forensics Detectors here.

Phone: +1 424-341-3886