DIY exposure measurement

The checklist for a good CO2 meter

By Peter Boodts – Occupational hygienist Arizo
13 October 2026

What should you look for when buying a CO2 meter?

Since the introduction of the new regulations on indoor air quality, one thing is clear: CO2 plays a crucial role in healthy indoor spaces. But how do you know whether you are choosing a good CO2 meter? The government has published a practical guide with a clear checklist for this purpose.

We have listed the most important points of attention for you, and show you how to make sure your device meets the requirements.

Why a CO2 meter matters

CO2 is a strong indicator of indoor air quality. The higher the CO2 concentration, the greater the likelihood of insufficient ventilation and the higher the risk of aerosol transmission.

With a reliable CO2 meter, you can:

  • quickly detect ventilation issues
  • take timely action (increase ventilation, adjust systems)
  • demonstrate compliance with regulations

Why a CO2 meter matters

CO2 is a strong indicator of indoor air quality. The higher the CO2 concentration, the greater the likelihood of insufficient ventilation and the higher the risk of aerosol transmission.

With a reliable CO2 meter, you can:

  • quickly detect ventilation issues
  • take timely action (increase ventilation, adjust systems)
  • demonstrate compliance with regulations

The checklist: what should a good CO2 meter meet?

The government defines several clear criteria. These are the most important:

1. Accurate measurement technology

Always choose a device that directly measures CO2, such as one with an NDIR sensor.

Indirect measurements (“CO2 equivalent”) are not sufficiently reliable.

2. Calibration is essential

Every sensor ages and must be calibrated.

Preferred options are:

  • automatic calibration (e.g. ABC logic or dual beam)
  • manual calibration in outdoor air

Regular external lab calibration is not recommended.

3. Sufficient measurement range

A reliable device measures at least up to 2000 ppm, preferably up to 5000 ppm.

4. Reliable accuracy

The measurement error should remain within a maximum of 10%.

5. Clear and usable information

A good CO2 meter:

  • displays values on a screen
  • records data
  • gives a visual or audible alarm when limits are exceeded

This lets you take immediate action when needed.

6. Practical to use

Also consider:

  • fixed or portable installation
  • visibility for users
  • option to share data

Important: not every CO2 meter is suitable

Although there are many devices on the market, not all of them meet these criteria. Devices that work with “equivalent CO2” or without calibration options in particular can lead to wrong conclusions.

Good news: our CO2 meter meets this checklist

Our CO2 meter:

  • uses an NDIR sensor (direct measurement)
  • offers reliable calibration options
  • provides an appropriate measurement range and accuracy
  • delivers clear and actionable measurement data

In short: you can be confident that your device complies with current regulations and provides reliable data.

Good news: our CO2 meter meets this checklist

Our CO2 meter:

  • uses an NDIR sensor (direct measurement)
  • offers reliable calibration options
  • provides an appropriate measurement range and accuracy
  • delivers clear and actionable measurement data

In short: you can be confident that your device complies with current regulations and provides reliable data.

Conclusion

A CO2 meter is not a gadget, but an essential instrument for healthy indoor air. By following the government checklist, you make an informed choice and avoid inaccurate measurements.

Unsure about your current device or want to be certain of the right solution? We are happy to help.

Questions? Ask them here!

Source: Public Health, Food Chain Safety and Environment