ZSX Primus IV features an innovative optics-above configuration. Providing superior performance with the flexibility for analyzing the most complex samples, the ZSX Primus IV spectrometer features a 30-micron tube, the thinnest end-window tube available in the industry, for exceptional light element (low-Z) detection limits.  EZ-scan allows users to perform XRF elemental analysis of unknown samples without any prior setup.  Combined with SQX fundamental parameters software, it provides the most accurate and rapid XRF results possible. SQX is capable of automatically correcting for all matrix effects, including line overlaps.  ​Nitrogen gas can now be used as the atmospheric gas in place of helium.