YBM DT01 Digital Thermometer comes with assured Quality. We show you how to measure your body temperature correctly. You will also find out why technical precision and clinical reliability of the measurement should not be confused. Choose the body part: A. Rectal measurement Taking a rectal measurement is the most reliable way to obtain a core temperature value. Result variation with this type of measurement is low and the precision is particularly high. The normal temperature range is approximately between 36.2