Thanks barbarian, but may be I wasn't clear, I will use a RTD thermometer to measure temperature, but I need a mean to "manipulate" the electrical signal that I will obtain from this thermometer. I thought to use a Weastone bridge to conditioning voltage signal obtained from this...
I'm designing a thermometer for presicion application. I found that I can to use a Wheatstone bridge design using a presicion resistor of manganine. I tried to find a form to obtain this device but is very difficult, or expensive. Somebody know where is possible to buy it or a different material...