Table 1 Accuracy and precision before and after the calibration process of the iButtons

Before calibration

0.53 ± 0.08

range: 0.40 to 0.65

− 0.16 ± 0.45

range: − 1.02 to 0.66

0.29 ± 0.02

range: 0.24 to 0.31

3.62 ± 0.39

range: 3.07 to 4.43

After calibration

0.05 ± 0.09

range: 0.03 to 0.07

0.06 ± 2.14

range: − 0.97 to 2.17

0.19 ± 0.31

range: 0.03 to 0.14

1.6 ± 0.76

range: 0.8 to 2.11