Pt100 RTD Table (Ω vs °C)

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Type a value to read the table instantly. Values between table points are interpolated linearly.

Pt100 RTD Table, resistance in Ω

About this Table

Full Pt100 RTD Table from −200 to 850 °C in 1 °C steps, calculated with the IEC 60751 Callendar Van Dusen equation for alpha = 0.00385 Ω/Ω/°C.

Basis: IEC 60751: R = R0 (1 + A t + B t²) for t ≥ 0 °C, plus C (t − 100) t³ below 0 °C. A = 3.9083 × 10−³, B = −5.775 × 10−⁷, C = −4.183 × 10−¹², R0 = 100 Ω.

How to use

1. Find the row for the tens of degrees and move across to the units column: row 30, column +7 is 37 °C.
2. For negative rows the column is still added: row −50, column +3 is −47 °C.
3. Measure sensor resistance with the sensor disconnected and subtract lead resistance for 2 wire circuits.

Notes

• Sensitivity is about 0.385 Ω/°C between 0 and 100 °C.
• Use the RTD tolerance table to check whether a measured value is within class A or B.

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