In this document an indirect measurement high temperature probe based on tunnel magnetoresistance
The rst part discusses the commercial available devices in the market and which one is
best suited for the speci cations. The second part is a theoretical introduction to magnetoresistance
and its behavior at high temperature and nally the last part is the analysis of
the experimental data obtained. The sensor, which operates in open-loop and can be easily
integrated, is able to operate up 250 degrees Celsius.