In science building, carbon dioxide in the classroom was found in a range of 477-5,310 ppm (1-175 students) while the average air change rate was ACH. Therefore, the ventilation rates for all classrooms were inadequate. The accumulation of carbon dioxide was also observed from the beginning to the end of each session.
Air quality sensor will send alerts to App in case of high PPM levels of CO2, benzene, alcohol, sulphide, smoke and other harmful gases. Total 5 gas levels: Good: 0-600ppm. Fairly good: 600-1100ppm. Average: 1100-2100ppm. Bad: 2100-3100pmm. Very bad: 3100ppm and more. Power consumption: 5VDC, 220mA. IR distance: Max. 6 meters at line of sight