| Compound | Concentration | Unit |
| O2 | 2 - 4 | %-wet |
| CO2 | 55 - 65 | %-wet |
| H2O | 7 - 15 | %-wet |
| N2 + Ar | 7 - 10 | %-wet |
| CO | 45 - 70 | ppm |
| SO2 | 50 - 240 | ppm |
| NOx | 50 - 70 | ppm |
| Others: NH3, HCl, C2H4, CHOH, etc. | ||