Table 7.
Summary of O3 sensor performance attributes from the subject matter expert discussion on Day 3. (Note: The listed sensor performance values should not be considered suggestive about any specific US EPA recommended means of establishing such a value).
| Technology Attribute | Minimum Acceptable Value/Range (count)a | Estimated Minimum Acceptable Value/Range |
|---|---|---|
| Accuracy | 7% (1) | Range: 7%–20% |
| 10% (2) 15% (2) 20% (1) |
Median: 13% | |
| Bias | 5% (1) | Range: 5%–25% |
| 10% (1) | or 2 ppb-5 ppb | |
| 25% (1) 10–20% (1) 2 ppb (1) 5 ppb (1) 3–5 ppb (1) |
Median: 12.5% or 4 ppb | |
| Correlation | r = 0.74 (1) | Range: r = 0.74–0.95 |
| r = 0.89 (1) r = 0.95 (1) | Median: r = 0.86 | |
| Detection Limit | 2 ppb (1) | Range: 2ppb-10 ppb |
| 10 ppb(1) 2–5 ppb (1) |
Median: 5 ppb | |
| Precision | 7% (1) | Range: 7%–20% or 5 ppb- 200 ppb |
| 15% (2) 20% (2) 5 ppb (1) 5–10 ppb (1) 30–200 ppb (1) |
Median: 15% or 102 ppb | |
| Range | 0–180 ppb (1) | Range: 0 ppb-200 ppb |
| 0–200 ppb (1) 10–200 ppb (1) 200 ppb (1) |
Median: 100 ppb | |
a
Numbers (X) represent the count of SEs who suggested each metric.