Environmental regulations in many parts of the world now limit sulphur content in petroleum-based fuels, and this has spurred the development of more sensitive instruments to detect and analyze the element at low concentrations. Rigaku’s Micro-Z ULS sulphur analyzer is a benchtop wavelength dispersive X-ray fluorescence (WDXRF) instrument that measures both the sulphur peak and background intensity. It meets both the ASTM 2622-10 and ISO 20884 specifications, has a lower limit of detection of 0.3 ppm, and can be powered by any standard AC outlet. Rigaku Corporation