Accessible Technical Resource
Steinhart-Hart Example Coefficients by Curve
Example four-term Steinhart-Hart coefficients for six North Star Sensors resistance-versus-temperature curves.
This page is the accessible HTML alternative to the Steinhart-Hart Coefficients by Curve document (PDF).
The four-term equation is:
1/T = A + B[ln(R)] + C[ln(R)]² + D[ln(R)]³
T is temperature in kelvin (273.15 + °C). R is resistance in ohms (Ω). A, B, C, and D depend on the curve, temperature range, and resistance at 25 °C.
Example coefficients from 0 °C to 70 °C
| Curve and nominal resistance at 25 °C | A | B | C | D |
|---|---|---|---|---|
| Curve 44, 10,000 Ω | 1.18090254918130E−03 | 2.16884014794388E−04 | 1.90058756197216E−06 | 1.83161892641824E−08 |
| Curve 35, 100 Ω | 1.95525276683993E−03 | 2.90075997498480E−04 | 2.17525522506513E−06 | 1.71837195435572E−07 |
| Curve 38, 1,000 Ω | 1.43291542079688E−03 | 2.72319937659526E−04 | −4.58846025754717E−07 | 1.87721342921284E−07 |
| Curve 40, 10,000 Ω | 1.02192985237609E−03 | 2.41453242427025E−04 | −2.47620754758454E−07 | 1.65394923419592E−07 |
| Curve 43, 30,000 Ω | 9.42164711576043E−04 | 2.18768747818204E−04 | 2.55333661814544E−07 | 1.18147224923565E−07 |
| Curve 47, 100,000 Ω | 8.24227928718280E−04 | 2.09591365025075E−04 | −7.13450294918816E−08 | 8.27225454547728E−08 |
For an interactive implementation, use the Steinhart-Hart Calculator.