CO₂ Traffic Light for Schools – Measuring Technology for Improved Air Hygiene in the Classroom

CO₂ Traffic Light for Schools

Even before Covid-19, indoor air hygiene was an important topic in schools. Fresh, unpolluted air ensures a clear head – a basic requirement for a good learning environment. This year, however, awareness of the importance of proper ventilation has once again increased. A CO2 traffic light for schools provides reliable measurement data and helps teachers and school directors to ensure a sufficient air supply. The CO2 concentration display (as an indicator of air quality) and audible signals tell the teacher when it is time to let some fresh air in. 

Regular Ventilation in the School Reduces the Risk of Infection

It is now well known that maximising the supply of fresh air is an effective way to remove potentially viral aerosols from indoor spaces.¹ The recommendation for schools is therefore to ventilate classrooms properly during every break. Ideally, classrooms should also be ventilated thoroughly during lessons (every 20-25 minutes), especially if the lessons are longer than 45 minutes. 

But How Are Teachers to Know What Sufficient Ventilation Means?

In practice, there is a tendency to neglect the supply of fresh air. The cold air from outside is not very likely to be let into the classroom if the children are feeling cold inside. Ventilation is then delayed, especially if teachers do not yet find the indoor air in the classroom unpleasant. But intuitive indoor air perception alone should not be an indicator of air quality. A CO2 traffic light for schools can provide reliable guide values here and help teachers to ventilate properly.

Unequivocal Recommendation from Official Working Groups: A CO₂ Traffic Light for Schools Makes Sense

The Austrian Ministry of the Environment points out that the installation of a CO2 traffic light for schools is a meaningful measure for ensuring healthy air quality.² The German Federal Environment Agency also states in an opinion on the containment of the corona virus that CO2 traffic lights are a useful tool for proper ventilation.³ They measure the CO2 concentration in the classroom. In principle, the higher the value, the "staler" the air is. The probability that virus-contaminated aerosols are present in the room air is then higher. Visible and/or audible signals from the CO2 traffic light indicate when a limit value has been exceeded. If a value of over 1,000 ppm is exceeded, the display of the CO2 traffic light changes from green to yellow, for example, indicating that ventilation is required. 

CO₂ Traffic Light for Schools from Austrian Sensor Manufacturer E+E Elektronik

E+E Elektronik has developed and produced high-quality sensors and measuring instruments for 30 years. The CO2 traffic light by the Austrian sensor specialist enables easy and reliable monitoring of the CO2 content in schools.

  • Ready for immediate use, battery operated and flexible for placement in any room
  • Easy to understand, LED traffic light principle with 6-part measured value scale 
  • Precise and maintenance-free, thanks to state-of-the-art CO2 measurement technology 

Discover more about the CO2 traffic light for schools here »

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