A probe design for a thermometer sensor is shown for a thermometer device that takes a patients temperature measurement. The thermometer may be utilized for taking the patients temperature measurement both invasively and non-invasively without the drawbacks of probes used only for invasive use or non-invasive use alone. Further described is a method for individual patient correction of a non-invasive temperature reading since non-invasive temperature requires a correction or bias to give a better estimate of core body temperature. The correction method utilizes personal data like gender, age, weight, height and/or BMI and also physiological parameter data such as patient blood perfusion, bio-impedance and pulse rate to individually customize a correction or bias for each patient to achieve a more accurate non-invasive temperature measurement.
