Table 1. eNose sensor functionalization.
| Sensor number | Sensor name | Object substances for sensing | Limit of detection |
|---|---|---|---|
| Sensor 1 | W1C | Aromatics | 5 ppm |
| Sensor 2 | W5S | Ammonia and aromatic molecules | 1 ppm |
| Sensor 3 | W3C | Broad-nitrogen oxide | 5 ppm |
| Sensor 4 | W6S | Hydrogen | 5 ppm |
| Sensor 5 | W5C | Methane, propane, and aliphatics | 1 ppm |
| Sensor 6 | W1S | Broad-methane | 5 ppm |
| Sensor 7 | W1W | Sulfur-containing organics | 0.1 ppm |
| Sensor 8 | W2S | Broad-alcohols, broad-carbon chains | 5 ppm |
| Sensor 9 | W2W | Aromatics, sulfur- and chlorine-containing organics | 1 ppm |
| Sensor 10 | W3S | Methane and aliphatics | 5 ppm |
The specific functionalization of each of the 10 sensors in the PEN3 eNose as defined by the manufacturer.