Pt1000
A Pt1000 is a platinum RTD with a nominal resistance of 1000 Ω at 0 °C.
rtd_sensor.pt1000 uses the verified IEC 60751 PT-385 characteristic over
-200 °C to 850 °C.
Quick use
from rtd_sensor import pt1000
resistance_ohms = pt1000.celsius_to_resistance(100.0)
temperature_c = pt1000.resistance_to_celsius(resistance_ohms)
Why its resistance change is larger
Pt100, Pt500, and Pt1000 share the same normalized characteristic. Scaling the reference resistance scales the absolute resistance curve. Near the same temperature, a Pt1000 therefore changes by roughly ten times as many ohms per degree as a Pt100.
You can inspect that directly:
from rtd_sensor import pt100, pt1000
print(pt100.resistance_sensitivity_ohms_per_celsius(25.0))
print(pt1000.resistance_sensitivity_ohms_per_celsius(25.0))
Do not confuse Pt1000 with Ni1000
Both may read about 1000 Ω at 0 °C, but platinum and nickel characteristics are not interchangeable. Use the documented sensor characteristic, not nominal resistance alone.