SpectroTest is a mobile metal analyzer. The probe which executes the spark for the analysis, is connected to the electronics through a flexible optical fiber with a length of 8 meters. In this configuration, it is possible to move the probe (and so the spark positioning) to the product, instead of the other way around. Because it is a mobile instrument for use in the production area, it is designed to work in a relatively hostile environment. Therefore, it is the perfect instrument for online spectral analysis.