Table 3.
Sensor readings (average ± standard deviation) at three different CO2 levels. Concentrations obtained by the reference analyzer are also shown. Units are expressed in ppm.
| CO2 level | 600 | 2400 | 4000 |
|---|---|---|---|
| Reference | 607.9 ± 2.0 | 2386.5 ± 2.1 | 4039.4 ± 4.3 |
| Sensor #1 | 2328.0 ± 2.1 | 5823.5 ± 4.0 | 9153.7 ± 6.9 |
| Sensor #2 | 841.6 ± 2.1 | 3013.3 ± 4.0 | 5073.8 ± 6.3 |
| Sensor #3 | 774.1 ± 2.1 | 2843.2 ± 4.0 | 4885.5 ± 6.3 |
| Sensor #4 | 1976.8 ± 2.1 | 5133.0 ± 4.0 | 8280.0 ± 6.3 |
| Sensor #5 | 943.2 ± 2.1 | 3150.3 ± 4.0 | 5339.7 ± 6.3 |
| Sensor #6 | 743.1 ± 2.1 | 2751.7 ± 4.0 | 4762.0 ± 6.3 |
| Sensor #7 | 866.6 ± 2.1 | 2992.8 ± 4.0 | 5111.2 ± 6.3 |
| Sensor #8 | 828.0 ± 2.1 | 2951.6 ± 4.0 | 5079.9 ± 6.3 |
| Sensor #9 | 978.7 ± 2.1 | 3164.2 ± 4.0 | 5274.7 ± 6.3 |
| Sensor #10 | 1219.9 ± 2.1 | 3547.7 ± 4.0 | 5759.0 ± 6.3 |
| Sensor #11 | 1333.6 ± 2.1 | 3779.1 ± 4.0 | 6132.3 ± 6.3 |
| Sensor #12 | 822.0 ± 2.1 | 2921.5 ± 4.0 | 4993.7 ± 6.3 |