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Thermistor Constant Conversions: Beta to Steinhart-Hart

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Thermistor Constant Conversions: Beta to Steinhart-Hart

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The non-linear resistance-temperature characteristics of negative-temperature coeffi cient (NTC) thermistors may be modeled to a high degree of accuracy using several modeling techniques. The most popular model is the Steinhart-Hart equation.An early equation called the “Beta” formula proved to be useful over narrow temperature ranges. This equation requires a twopoint calibration but, under the best conditions, is accurate to approximately ±1°C over the temperature range of 0°C to 100°C.

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