Measures 5 major health risks.
Carbon dioxide (CO2) - rises quickly in a room when there is poor ventilation or a lot of people. High CO2 levels cause decreased concentration and fatigue.
Formaldehyde (HCHO) - a highly toxic cancer-causing chemical that can be found in furniture, textiles, building materials, cleaning products...
Volatile organic compounds (TVOC) - gaseous substances that come from: varnishes, paints, furniture, cleaning products, acetone, toluene, benzene...
Also measures temperature and humidity.