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Thermistor Calibration and the Steinhart-Hart Equation

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Thermistor Calibration and the Steinhart-Hart Equation

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Thermistors provide an inexpensive and accurate temperature monitor for use with laser diodes. The nonlinear resistancetemperature characteristics of a NegativeTemperature Coeffi cient (NTC) thermistor may be modeled to a high degree of accuracy using the Steinhart-Hart equation, LaGrange polynomials, or other modeling techniques. In 1968, Steinhart and Hart developed a model for thermistor R-T characteristics i order to make accurate temperature measurements for oceanic studies. Today, the most popular model for R-T characterization is the Steinhart-Hart equation.

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