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brennenstuhl® CO2 detector

CO2 meter warns of CO2 pollution and serves to protect against infection

The CO2 meter C2M L 4050 from brennenstuhl® serves as a CO2 detector for monitoring air quality - with display and acoustic signal as well as integrated battery for up to 12h mains-independent operation.

How a CO2 detector helps to improve air quality

A CO2 meter measures the CO2 concentration (carbon dioxide) and thus monitors the air quality. The CO2 concentration (carbon dioxide, also known as carbon dioxide) is considered an indicator of the aerosol content of the room air and is thus an indication of potential exposure to viruses (e.g. Covid19 etc.). The CO2 measuring device is therefore also used to assess the risk of infection by aerosols.

The result of the measurement is indicated visually. On the one hand, the result of the measurement appears as a value on the display. The traffic light display allows a quick reading of how the current air quality is to be assessed. The CO2 meter thus provides quick and clear information about the air quality in rooms. At a critical level, an additional alarm signal indicates the need for ventilation.

Increased ventilation, i.e. exchanging the room air with fresh outside air, can reduce the content of aerosols that may pollute the room air. In this way, a CO2 measuring device indirectly helps to reduce the risk of infection. 

What does which CO2 value mean?

The CO2 content in the air is expressed in parts per million, or ppm. CO2 meters indicate when ventilation is needed. This is not only used to monitor air quality, but also reduces the viral load. This can also help reduce the risk of transmission of coronaviruses.

The limit values for CO2 in rooms, according to EN 13779, are:

  • Below 800: High indoor air quality
  • 800 - 1,000: Average indoor air quality
  • 1,000 - 1,400: Moderate indoor air quality
  • Above 1,400: Low indoor air quality


How much ppm CO2 is dangerous?

Poor indoor air is unhealthy. It can cause drowsiness, poor concentration and illness. Headaches and fatigue can set in as symptoms and the viral load in enclosed spaces is increased. A higher value above 1,400 ppm is classified as dangerous from an air-hygienic point of view.

At a CO2 level between 1,000 - 1,400 ppm, the first symptoms may start and it is recommended to ventilate. At a maximum indoor guideline value of 1,500 ppm, ventilation is required! Above 2,000 ppm, the risk of infection increases significantly.

What produces carbon dioxide collect in the room?

The human body constantly releases CO2 into the ambient air, for example through breathing. This inevitably increases the CO2 concentration in the room over time, especially if several people are in the room together for a longer period of time. In addition, there are other exhalations from the body, clothing and even furniture, floor coverings and building materials. The air gets worse and worse over time.

Is CO2 harmful to health?

People who repeatedly spend hours in rooms with poor air quality and too high a CO2 concentration are less productive or even sleepy. This often applies to pupils, students and teachers, for example. But such phenomena can also be found in offices and meeting rooms.

If bad air or a too high CO2 content becomes a permanent burden for several hours a day, complaints can become chronic. Headaches do not disappear after leaving the room. The constant discomfort can also lead to persistent tiredness during the day or sleep disturbances at night. An increased sensitivity to allergens can also develop.