Someone have the polynomial equation for the PT100 thermoresistance sensor ?

Many thanks in advance

Francesco Riti

 

Hi Riti
You can use this one:

Rt = 100 + 0.391*T - 0.00006*T*T
where
Rt = resistance in ohm
T = temperature in Deg.C

This work well with 0-100 Deg.C. You can even with
some algebra calculate the temperature given the
resistance.

If you really want to read over a wider
area, you can use the following polynomial:

Rt = c0 + c1*T + c2*T^2 + c3*T^3 + ... + cn*T^n
Order = 5; Range -200 - 200 Deg.C
c0 = 100
c1 = 0.3909706
c2 = -0.5970833E-5
c3 = 0.1722222E-9
c4 = -0.2991667E-11
c5 = 0.1072222E-13

I hope this will do

Herman