Rigaku’s ZSX Primus IV is a tube-above, wavelength dispersive X-ray fluorscence spectrometer with improved functionality and performance. It includes “ZSX Guidance” software and error prevention functionality to help novice users. The tube-above configuration enables samples to be analysed without the use of protective film, due to spills not affecting the optical system, avoiding intensity reduction from the film. Light element sensitivity is boosted by the system’s auto pressure control, which regulates and stabilises the vacuum conditions. During analysis, regions of interest can be located in enlarged images of the sample taken with a high-resolution camera. The r-q sample stage can be accurately positioned to facilitate measurements with uniform sensitivity on these small areas.