Pt500
A Pt500 is a platinum RTD with a nominal resistance of 500 Ω at 0 °C.
rtd_sensor.pt500 uses the same normalized IEC 60751 PT-385 characteristic as
Pt100 and Pt1000, with a 500 Ω reference resistance.
Supported characteristic range: -200 °C to 850 °C.
Quick use
from rtd_sensor import pt500
resistance_ohms = pt500.celsius_to_resistance(50.0)
temperature_c = pt500.resistance_to_celsius(resistance_ohms)
Compare with Pt100
from rtd_sensor import pt100, pt500
r100 = pt100.celsius_to_resistance(100.0)
r500 = pt500.celsius_to_resistance(100.0)
The two sensors follow the same normalized platinum curve, but the Pt500's absolute resistance and resistance change per degree are five times larger.
Module constants and sensitivity
pt500 exposes R0_OHMS, MIN_TEMPERATURE_C, MAX_TEMPERATURE_C, and both
sensitivity functions in the same form as pt100.
When to use a configurable model
If your individual Pt500 has a characterized resistance at 0 °C rather than the
nominal 500 Ω value, use IEC60751RTDModel(r0_ohms=...) with the appropriate
range.