That's it. I took real values measuring the resistance and the voltage. The images show the real values and the theoretical values(left bottom corner on the first image) predicted by the mathematical model. Of course, I have to rise the temperature and read several values.
The current is on the order of hundreds of uA which is good because it prevents the self-heating.

Sterilizer's bridge

Researching, I found that the Wheatstone bridge it's the most common mode for obtaining a change of voltage due to a change of resistance. After a few elementary maths I've reached the resistance vs voltage equation. If I didn't make any mistakes, then the picture shows this plot. If I did have mistakes, then I will apologise (again) and re-do the job. Of course, being the plot positive or negative is just a matter of how the voltage is being measured.

Sterilizer's Temperature(Update)

Today, the RTD temperature sensors arrived. I can now put the correct plot. I don't think putting the Resistance vs Temperature equation to the FPGA will be a problem, but I'm not quite sure if it's worth the effort. Perhaps would be easier to obtain a linear regression and use the form Y=a+bX.

The known universe by AMNH

Un gran video. Una mirada al universo (en forma digital). Chequenlo, no se van a arrepentir.

The Known Universe