| Checks for carbon dioxide concentrations |
| Maintenance-free NDIR (non-dispersive infrared) CO2 sensor |
| Indoor air quality displayed in ppm with good (380 to 420 ppm), normal (<1000 ppm), poor (>1000 ppm) indication |
| Visible and audible CO2 warning alarm with relay output for ventilation control |
| Displays year, month, date and time |
| Minimum/maximum CO2 value recall function |
| Automatic baseline calibration (min CO2 level over 7.5 days) or manual calibration in fresh air |
| Rounded desktop meter measures carbon dioxide (CO2), air temperature and humidity |
