This CO2 meter for air quality monitoring can be used in professional and public institutions such as schools, nurseries and offices. Essential for air quality monitoring, it continuously measures and displays CO2 values from 400 to 5000 ppm. NDIR (Infrared) CO2 sensor technology is specifically dedicated to measure the CO2 concentration in a room, giving a very reliable reading. The meter has a backlit LCD screen with intensity adjustable across 3 levels. It offers real time and continuous display of CO2 values in the room. Display features easy to read, colour coded smileys for simple and clear understanding of the measurements.