Calculadora de Termistor NTC

Calcula la temperatura a partir de la resistencia de un termistor NTC usando la ecuación de Steinhart-Hart.

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Fórmula

\frac{1}{T} = \frac{1}{T_0} + \frac{1}{\beta} \ln\left(\frac{R}{R_0}\right)

T — Temperature (K)

T₀ — Reference temperature (K)

β — Beta coefficient (K)

R — Measured resistance (Ω)

R₀ — Reference resistance at T₀ (Ω)

Cómo Funciona

NTC (Negative Temperature Coefficient) thermistors are temperature-sensitive resistors that change resistance predictably with temperature. The Steinhart-Hart equation provides a precise mathematical model for converting resistance measurements to actual temperature values. This advanced thermodynamic relationship allows precise temperature sensing across various applications in electronics, industrial monitoring, and scientific instrumentation.

Ejemplo Resuelto

Problem: Calculate the temperature for an NTC thermistor with R = 4500 Ω, R0 = 5000 Ω, β = 3950 K, at standard reference temperature T0 = 25°C Solution: 1. Apply Steinhart-Hart simplified equation: T = 1 / (1/T0 + (1/β) * ln(R/R0)) 2. Substitute values: 1 / (1/298.15 + (1/3950) * ln(4500/5000)) 3. Calculate intermediate steps 4. Result: Approximately 35°C (308.15 K)

Consejos Prácticos

✓Always verify the specific β value for your thermistor model
✓Ensure stable measurement conditions for accurate readings
✓Use high-precision measurement equipment for best results

Errores Comunes

✗Confusing resistance values at different temperatures
✗Using incorrect β constant for specific thermistor type
✗Neglecting precise calibration of reference resistance R0

Preguntas Frecuentes

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