Electronics · Sensors and analog signals / Principles and inquiry
Thermistor thermometer experiment guide
Build a temperature-resistance calibration curve and infer temperature from measured voltage.
How does it work?
An NTC thermistor has lower resistance at higher temperature.
Key relationship
R(T) = R₀ exp[β(1/T−1/T₀)]
Try this investigation
- Build a temperature-resistance calibration curve and infer temperature from measured voltage.
- Run and record each of the three baseline presets.
- Compare the changed variable and its result with the baseline records.
Interpreting your results
Using the reference β, what temperature corresponds to a measured resistance of 10 kΩ?
25 °C
Assumptions and limitations
Self-heating, measurement noise and thermal lag are omitted. The calibration model assumes known β. Experiment on screen; do not reproduce this with real power supplies, outlets or high voltage.