Sensors for air quality measurement to schools

Five HTLs in Carinthia and six HTLs in Tyrol receive high-precision CO2 sensors from Infineon Austria and MCI in Innsbruck. The teams of students will use them to build CO2 alarm lights to indicate ventilation and reduce the risk of infection. A total of 300 classrooms will be equipped.

Indoor CO2 levels are an important indicator of air quality. Particularly in the current pandemic, this value can help contain the spread of viruses. Regular cross-ventilation and shock-ventilation of classes – in addition to ongoing testing and mask-wearing - is therefore also included in the specifications of the Ministry of Education. But when is it time to ventilate? Infineon and the MCI are providing the CO2 sensor kits free of charge to 11 technical teaching institutions in Carinthia and Tyrol in order to use state-of-the-art technology to draw attention to the need for timely ventilation in the classroom.

Creating a benefit with education and know-how

In the spirit of 'learning by doing', the young technical talents use Infineon sensors to build their own air quality measurement systems that warn of excessive CO2 concentrations and thus reduce the risk of virus transmission.

Learning in a healthy indoor environment is of paramount importance, especially in times like these. Sabine Herlitschka, CEO Infineon Austria: "With our initiative we want to support the young talents in their technology education and enable a healthy learning atmosphere in the classroom. The students as well as the teachers are actively involved, can combine the knowledge of several subjects - from electronics, computer science to physics - and combine it with health-related topics. This encourages participation, strengthens team spirit and creates digital solutions with a benefit for the entire school."

Precise sensor measures air quality and saves energy

At the heart of the CO2 sensor is an Infineon module based on XENSIV PAS technology. It measures the CO2 content precisely, reliably and continuously. In addition, other parameters such as temperature, humidity and air pressure are measured. As soon as a limit value is exceeded, an alarm can be triggered via a CO2 alarm light. According to the Ministry of the Environment, the CO2 (carbon dioxide) concentration in classrooms should not exceed an average of 1,000 ppm (parts per million, i.e. 0.1 percent by volume). Since the concentration of aerosols through which the virus is transmitted correlates with the concentration of CO2, the CO2 sensor can help ensure that people can meet in safe indoor-conditions - whether in the office, at school or at home.

"We have created an easy-to-use system solution in our innovation lab, the "Emerging Applications Lab", which is run jointly with Infineon, and it is already in use in 12 lecture halls in Innsbruck. Another 50 lecture hall systems are in preparation. With the display of the CO2 value, we have an objective benchmark for the energy-efficient supply of fresh air, can ventilate according to demand and avoid unnecessary energy losses, especially during the winter season. We are happy to pass on this developer and user know-how to the schools," says MCI Rector Andreas Altmann.

STEM talents and schools network

In Carinthia, the HTL in Villach, Klagenfurt Mössinger- und Lastenstraße, Wolfsberg and Ferlach are participating. In Tyrol, the HTL Innsbruck Trenkwalderstraße, in Jenbach, Kramsach, Lienz, Imst and IKA Reutte. At school, the students learn to build and program a CO2 alarm light under the guidance of the teachers. This allows them to deepen their hardware and software knowledge, create a digital design with LED lights and acoustic signals, control the system and expand it to an Internet-of-Things platform. To this end, a dedicated developer forum was set up across the schools to network, share knowledge and develop ideas for further innovations. Digital technologies thus offer real added value for education and collaboration.

Smart building management at HTL Villach

The school team at HTL Villach is going one step further: the CO2 sensors are not only being used in the classes, but are also to be integrated into the technology of the building conversion currently underway. Networking with the infrastructure control concept will enable automated and continuous data collection and data evaluation for the entire school. For example, noise levels could also be measured in the future.

This practical collaboration between industry and education shows how STEM subjects (Science, Technology, Engineering, and Mathematics) can be used to create smart solutions for topics at the cutting edge of technology. Thus, it is an active contribution to practice-oriented education, as well as to qualified technical specialists in the region. 

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