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In vitro CO measures (ppm) provided by B&K and PiCO+ on four standards
| Standard | B&K | PiCO+ | P |
|---|---|---|---|
| 5 ppm | 5.1 (0.1) | 6.7 (0.4) | <0.01 |
| 9.9 ppm | 10.00 (0.1) | 12.0 (0.9) | <0.05 |
| 20 ppm | 19.00 (0.1) | 18.5 (0.6) | 0.59 |
| 50 ppm | 47.9 (0.2) | 47.0 (1.0) | 0.28 |
Means (standard deviations) of three values are reported.
