Developed to detect the presence of CO2 in ambient air, this device is smart, compact and easy to use. In addition to measuring the CO2 concentration, the APCEMDL also measures the room’s ambient temperature and relative humidity. Its high quality LCD display is easy to read, and it features independent CO2, RH and temperature readings. In addition, it automatically records logged data to an included microSD card and includes a built-in microSD card port. It also calculates and displays ventilation rates.