For non-contact temperature measurement three things are important: the material being measured (emissivity), the environment (interference), and the pyrometer you choose. If you choose a SpectroPyrometer, you don’t have to worry about the other two. The SpectroPyrometer will determine and report the emissivity, eliminate the interference, and give you the temperature and its on-line accuracy (tolerance).  Accurate process temperatures allow effective process control, which translates into higher yield and productivity.