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Gas type | Measuring principle | Measuring range | Resolution | Measurement error | ||
Relative error | Absolute error | |||||
NO | UV-DOAS | 0~4000ppm | 1ppm | ±2% | ±25ppm | |
NO2 | NDUV | 0~1000ppm | 1ppm | ±2% | ±25ppm | |
CO2 | NDIR | 0~18% | 0.1%VOL | 0~16%:±3% 16~18%:±5% |
0~16%±0.3% | |
Smoke | Optical method | Light absorption coefficient K:(0~16)m-1 | K:0.01m-1 | ±2.0% | ||
Note: the absolute error and relative error listed in the table can meet one of the requirements |