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Engineering tools

Temperature Sensor Resistance Lookup

Read temperature from resistance, or find the expected resistance at a known temperature.

Quick start

Select the exact sensor curve and conversion direction, then enter resistance or temperature with its unit. Results update as you edit. Use nominal point loads a reference example; the table interval changes only the displayed rows.

Inputs

Sensor lookup

Result

Enable JavaScript to look up values.

Resistance–temperature table

Temperature (°C)Temperature (°F)Resistance (Ω)Resistance (kΩ)Lookup position

Curve reference: Sensor curve documentation

Method & assumptions

10k Type II, Type III and 1k Pt 375 use BAPI's published nominal resistance points with linear interpolation between them. Pt1000 / 1k Pt 385 uses the Callendar–Van Dusen equation. Every result shows °C, °F, Ω and kΩ.

Lookup is limited to the included reference interval. Out-of-range readings do not produce extrapolated temperatures. Table endpoints are included; changing the displayed table interval does not change the underlying interpolation method. Values are nominal estimates, not a calibration certificate.

“1k Pt” and “Pt1000” describe the same nominal resistance at 0°C. The 375 and 385 curves differ; match the sensor and controller curve. Lead-wire resistance, sensor tolerance and self-heating are not compensated by this lookup.

Sources, supported ranges and calculation details

Example

For either 10k thermistor, 10,000 Ω corresponds to 25°C / 77°F. A 1,000 Ω platinum RTD corresponds to 0°C / 32°F. Away from these nominal points, choose the correct curve before interpreting the reading.

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