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Some usefully specific parameters of gas detection filters.
| Gas | CWL/μm | Tolerance of CWL/nm | BW/nm | Tolerance of BW/nm |
|---|---|---|---|---|
| Reference | 3.95 | ±40 | 90 | ±20 |
| CO2 standard | 4.24 | ±40 | 180 | ±20 |
| CO2narrow | 4.24 | ±40 | 90 | ±20 |
| CO2 high AOL | 4.27 | ±30 | 170 | ±20 |
| CO2 long path | 4.45 | ±20 | 60 | ±20 |
| HC | 3.40 | ±30 | 120 | ±20 |
| CO | 4.66 | ±40 | 180 | ±20 |
| NOX | 5.30 | ±40 | 180 | ±20 |
| SO2 | 7.30 | ±40 | 200 | ±30 |
