Fig. 3.

Temperature effect on measurements of PO₂. Measurements were taken of the same solution with, and without temperature correction. The probe was immersed in a bath with a fixed PO₂ and the bath temperature ranged from 34-42 °C. The open circles show the PO₂ measured using automatic temperature correction. The closed circles show the PO₂ of the same bath when a fixed input temperature of 37 °C was used. Although there was a drift up, the change was not significant and the absolute difference from an automatic calibration was less than 1mmHg, well within the natural variation seen in a subject.