Thermal State is the measurement of the heat in the outermost surface of the body. Guardian personalizes a baseline for your baby’s skin temperature and projects the trend in the thermal state for the selected duration.
As soon as the sensor is on the baby’s ankle, it will show the room temperature for some time, and after 5 – 10 minutes, it should reach the baby’s skin temperature. After that, every 15 mins sensor will calculate the average temperature, and based on that average it will show + or -.