A simple method for accurate temperature measurement

A simple method, employing thermocouples, was developed for measurement of temperature with an accuracy of 0.05 degrees C. The method is based on the principle of a compensatory measurement of the thermocouple voltage, with application of an additional amplifier. The temperature level of the reference thermocouple was shifted from 0 degrees to 37 degrees C, using a compensating voltage. Within a smaller range (37 degrees -- 43 degrees C) the voltage of the measuring thermocouple was additionally amplified, which resulted in an increase in sensitivity and accuracy of the temperature measurement in animal tissues. The electronic circuit and calibration procedure are presented in detail.