Table 4.

Calibration parameters of individual sensors. The calibration model is CO₂ corrected = β₀ + β₁ × CO_{2 sensor} + ε. Standard errors of coefficients are indicated in parenthesis. The determination coefficient (R²) and the standard error of estimation (SEE) are also indicated.

CO2 level	β0	β1	R2	SEE (ppm)
Sensor #1	−537.4 (3.6)	0.498 (0.0006)	0.998	58.2
Sensor #2	−60.46 (3.9)	0.808 (0.001)	0.997	74.8
Sensor #3	−6.6 (4.7)	0.829 (0.001)	0.996	91.5
Sensor #4	−438.3 (4.6)	0.543 (0.001)	0.997	80.3
Sensor #5	−88.7 (5.7)	0.774 (0.002)	0.994	109.0
Sensor #6	7.2 (4.6)	0.849 (0.001)	0.996	91.0
Sensor #7	−57.2 (4.5)	0.803 (0.001)	0.996	87.5
Sensor #8	−24.5 (4.3)	0.802 (0.001)	0.997	83.3
Sensor #9	−144.9 (5.5)	0.793 (0.001)	0.995	102.3
Sensor #10	−283.9 (6.1)	0.749 (0.002)	0.994	110.5
Sensor #11	−309.0 (6.6)	0.708 (0.002)	0.993	117.1
Sensor #12	−37.0 (4.5)	0.818 (0.001)	0.996	86.6