How accurate are current CO2 and PM sensors used in Dutch schools?

There is a growing need for accurate low-cost indoor air quality (IAQ) sensors in schools. Therefore, a climate chamber performance study is conducted to evaluate the current scenario of low-cost sensors or monitors (LCMs) capable of measuring CO₂ and particulate matter (PM). Finally, the LCMs are compared using grading criteria to find out the best performing ones. Keywords: Low-cost monitors, sensors, indoor air quality, performance study, schools