In recent years, with new developments in industrialized countries, there are increasing demands for the analysis of rare metals and other mineral resources. Supermini, a 200-W benchtop wavelength dispersive X-ray fluorescence spectrometer (WDX), has been developed to meet these demands. Supermini is a compact sized benchtop instrument without requiring cooling water, and this makes it easy to install and operate. Elements from light elements including Na and F to heavy elements can be analyzed with high precisions.