Table 2.
Evaluation of mass concentrations reported by the sensors compared with the reference instrument for (A) PM1, (B) PM2.5mc, and (C) PM10 for environmental concentrations. EPA and NIOSH acceptance criteria: slope = 1.0 ± 0.1; intercept = 0 ± 5 µg/m3 (EPA only); r ≥ 0.97; and bias percentage = ±10% (NIOSH only).
| Instruments | Data Pairs | Slope | Intercept | r | % Bias | % CV |
|---|---|---|---|---|---|---|
| (A) PM1 | ||||||
| Salt | ||||||
| OPC-N3 | 8 | 1.67 | 0.12 | 0.99 | 64.81 | 74.06 |
| SPS30 | 8 | 0.92 | 0.07 | 0.99 | 63.30 | 5.59 |
| AirBeam2 | 8 | 0.41 | 0.79 | 0.97 | −76.71 | 34.83 |
| PMS A003 | 8 | 0.65 | 0.78 | 0.97 | −61.10 | 11.38 |
| ARD | ||||||
| OPC-N3 | 8 | 0.21 | 0.007 | 0.99 | −4.30 | 21.61 |
| SPS30 | 8 | 1.40 | −0.19 | 0.99 | 32.65 | 20.36 |
| AirBeam2 | 8 | 0.06 | −0.06 | 0.65 | −96.44 | 91.16 |
| PMS A003 | 8 | 0.21 | −0.14 | 0.65 | −86.18 | 105.77 |
| PAO-4 Oil | ||||||
| OPC-N3 | 8 | 1.09 | −0.01 | 0.99 | 10.90 | 55.42 |
| SPS30 | 8 | 1.15 | −0.03 | 0.99 | 8.28 | 10.77 |
| AirBeam2 | 8 | 0.07 | −0.08 | 0.83 | −96.80 | 105.92 |
| PMS A003 | 8 | 0.08 | 3.47 | 0.34 | 35.50 | 97.51 |
| (B) PM2.5mc | ||||||
| Salt | ||||||
| OPC-N3 | 8 | 0.87 | 0.05 | 0.99 | −41.76 | 78.37 |
| SPS30 | 8 | 0.49 | 0.31 | 0.99 | −6.10 | 8.54 |
| AirBeam2 | 8 | 0.29 | −1.05 | 0.99 | −79.48 | 34.83 |
| PMS A003 | 8 | 0.38 | −0.71 | 0.95 | −70.00 | 8.66 |
| pDR-1500 | 8 | 0.98 | 0.04 | 0.99 | −0.24 | - |
| ARD | ||||||
| OPC-N3 | 8 | 2.91 | −0.54 | 0.99 | 183.67 | 22.12 |
| SPS30 | 8 | 1.43 | 0.67 | 0.99 | 52.84 | 18.00 |
| AirBeam2 | 8 | 0.21 | −0.11 | 0.90 | −83.65 | 23.24 |
| PMS A003 | 8 | 0.28 | −0.46 | 0.97 | −82.29 | 86.43 |
| pDR-1500 | 8 | 2.14 | 2.27 | 0.98 | 150.09 | - |
| PAO-4 Oil | ||||||
| OPC-N3 | 8 | 1.82 | −0.19 | 0.99 | 79.30 | 60.43 |
| SPS30 | 8 | 0.90 | −0.88 | 0.99 | −28.23 | 11.39 |
| AirBeam2 | 8 | 0.22 | −0.52 | 0.97 | −87.23 | 65.72 |
| PMS A003 | 8 | 0.07 | 4.26 | 0.43 | −32.00 | 70.37 |
| pDR-1500 | 8 | 2.35 | −0.71 | 0.99 | 123.60 | - |
| (C) PM10 | ||||||
| Salt | ||||||
| OPC-N3 | 8 | 1.58 | 0.47 | 0.99 | −11.72 | 78.18 |
| SPS30 | 8 | 1.09 | 0.48 | 0.99 | 16.57 | 8.93 |
| AirBeam2 | 8 | 0.79 | 1.53 | 0.98 | −39.63 | 22.65 |
| PMS A003 | 8 | 0.89 | 1.04 | 0.94 | −11.55 | 4.16 |
| ARD | ||||||
| OPC-N3 | 8 | 1.55 | −7.04 | 0.99 | 39.51 | 27.56 |
| SPS30 | 8 | 0.25 | 4.28 | 0.94 | −64.92 | 15.09 |
| AirBeam2 | 8 | 0.05 | 1.07 | 0.79 | −93.02 | 30.27 |
| PMS A003 | 8 | 0.11 | 0.81 | 0.94 | −87.86 | 53.13 |
| PAO-4 Oil | ||||||
| OPC-N3 | 8 | 1.14 | 0.25 | 0.99 | 18.70 | 59.42 |
| SPS30 | 8 | 0.43 | −1.07 | 0.99 | −66.32 | 12.41 |
| AirBeam2 | 8 | 0.14 | −0.68 | 0.97 | −90.41 | 49.67 |
| PMS A003 | 8 | 0.09 | 9.76 | 0.58 | −46.62 | 47.55 |
CV: coefficient of variation.