LongITools CO2 maker kit

The longITools project focuses on the impact of environmental factors on cardiovascular risk, with a strong emphasis on air quality.

As part of this initiative, CyNexo developed an educational maker kit that enables students to build their own CO₂ sensors.

This hands-on project allows technology classes to assemble a sensor using an Arduino microcontroller, 3D print a custom case (available in STEP or STL format), and program the device to monitor indoor CO₂ levels in real-time. By engaging in this activity, students not only gain valuable STEM skills but also become more aware of how air quality affects their health and cognitive performance.

Scientific studies show that CO₂ levels have a direct impact on concentration, cognitive function, and overall well-being. Outdoor air typically contains 400–600 ppm of CO₂, which is optimal for learning and productivity.

Indoor levels between 600 and 1000 ppm are still acceptable, but as CO₂ rises above 1000 ppm, it can lead to mild drowsiness and reduced focus. Between 1200 and 1500 ppm, students may experience noticeable declines in cognitive performance, attention span, and memory retention. At levels exceeding 1500 ppm, symptoms like headaches, fatigue, and significant difficulty concentrating become more common, ultimately hindering learning outcomes.

To maintain an optimal learning environment, it’s crucial to keep CO₂ levels below 1000 ppm. One of the simplest and most effective ways to achieve this is by ensuring proper ventilation—opening windows and doors regularly to allow fresh air to circulate. This not only helps maintain healthy CO₂ levels but also improves energy efficiency in buildings. By allowing natural airflow, excess heat in warmer months can be dissipated, reducing the need for air conditioning, while in colder months, controlled ventilation prevents the buildup of stale air without unnecessary heat loss. As a result, classrooms can maintain a comfortable temperature while lowering heating and cooling expenses.

By building their own CO₂ sensors, students can actively monitor and manage their indoor air quality, developing a deeper understanding of the relationship between environmental factors and well-being.

Download the source files, assemble your own sensor, and take control of the air you breathe!