Table 1.
The characteristic parameters of the four-channel filter.
| Target Gas | Absorption Peak (µm) | Central Wavelength (CWL) (µm) |
Half-Power Bandwidth (HPB) (nm) |
|---|---|---|---|
| C3H8 | 3.39 | 3.33 | 160 |
| CO | 4.70 | 4.74 | 140 |
| CO2 | 4.25 | 4.26 | 180 |
| Ref gas | no | 3.95 | 90 |
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