The CO210 not only allows for monitoring indoor air quality but also for recording and analyzing measurement data. Elevated levels can negatively impact health, concentration, and overall well-being. The CO2 level should be monitored in all rooms where many people stay for extended periods. The display shows the measurements of CO2, air temperature, and humidity, as well as the time and date simultaneously. For an easy assessment of the CO2 level, an index symbol is also displayed: Good (0 - 800 ppm), Normal (800 - 1200 ppm), Poor (>1200 ppm). If the adjustable alarm threshold is exceeded, an alarm signal will sound.