Table 5.
Performance of the EC sensor in the lab (n = 3). In parenthesis are the simultaneous reference measurements.
| Platform | Averaging Time (min) | Pollutant | Mean ± STD at Zero-Air (ppb) | Mean ± STD at 100 ppb span * (ppb) | R2 | Gain | Intercept (ppb) | Cross-Sensitivity |
|---|---|---|---|---|---|---|---|---|
| AQMesh | 15 | CO | 16.3 ± 6 (1.9 ± 0.7) | 1292 ± 21.5 (1385 ± 16.2) | 0.99 | 0.86 | 0.07 | NO2 |
| NO | n/a (0.4 ± 0.4) | 88.5 ± 1.5 (94.1 ± 0.9) | 0.99 | 0.97 | −1.13 | |||
| NO2 | n/a (0.7 ± 0.3) | 126.4 ± 3.5 (103.9 ± 0.7) | 0.99 | 1.22 | −1.02 | |||
| O3 | n/a (0.8 ± 0.2) | 123.4 ± 2.3 (108.5 ± 1.5) | 0.99 | 1.16 | −1.27 | |||
| LEO | 1 | NO2 | 15.3 ± 10.8 (0.4 ± 0.3) | 49.0 ± 8.7 (94.3 ± 0.6) | 0.99 | 0.86 | 23.9 | NO2 |
| NO | 24.7 ± 3.1 (0.3 ± 0.2) | 117.9 ± 3.3 (107.7 ± 0.4) | 0.99 | 0.71 | −21.5 | |||
| O3 | 6.8 ± 4.1 (0.5 ± 0.5) | 57.5 ± 3.4 (86.1 ± 0.6) | 0.96 | 0.70 | −7.7 |
* Except for CO, where 1300 ppb was used as the span value.