I am pretty new to Arduino, played around a little with some small projects and becomming more and more a fan. Since my background in general electronics is not too well, I have a question which I hope can be answered by some experts around here:
Problem: I need to measure a thermal energy balance, i.e. the temperature before and after a component in an hydraulic circuit and the volume flow. Since the volume flow is high and the change in temperature (dT) is low, I need a precise differential temperature measurement. Since I want to measure dTs around 0.5K, "Precise" means around +-0.01K. The absolute temperature is not so important (+-1°C is ok), I only want the difference between the two sensors to be as accurate as possible.
What I got: The accurate flow measurement is no problem. I have PT100 RTDs (to be connected with 4wires) and can get my hands on a very accurate calibrator for those.
Question: Is this task solveable with an Arduino? I.e. is it possible, to set up a measurement chain, that will produce temperature difference values in a data file of that precision? Can I, for example, measure 3 energy balances (i.e. 6 temperatures) with a timestep of 3sec on one Arduino board?
Any answers would be highly appreciated.