The ELS3000 is a state-of-the-art instrument based on the development by Professor Harald Ibach and his co-workers at the KFA, Jülich, Germany. This instrument design initially led to the first reported resolution below 1.0 meV [0.98 meV (FWHM) for CO absorbed on Ir (100) (see figure below)]. The ELS3000 is now manufactured by LK Technologies per a worldwide licensing agreement with the KFA. The ELS3000 version of this design has obtained a resolution as high as 0.5 meV in direct beam geometry and less than 0.8 meV on a polymer film (see figure below). The ELS3000 was the first instrument to achieve such a high resolution on a polymer surface.