Linearizing the Self-Heated Thermistor Thermometer

A numerical method of linearizing a dc thermistor thermometer in which the power dissipated by the thermistor is sufficient to heat itself to a temperature significantly above ambient is developed and tested. It is shown that if the dissipation constant of the thermistor remains fixed, then the thermometer is able to detect temperature fluctuations considerably smaller than the internal temperature rise above ambient of the thermistor itself.