Depending on the software used, the PYLOX3 analyzer can be used to assess the content of total sulfur or ash in coal samples, the content of non-flammable parts in mine dust or other parameters of powdery substances mixtures, resulting from the variability of the elemental composition. The content of elements is determined by measuring the intensity of gamma radiation excited based on the phenomenon of fluorescence, in the ranges corresponding to the characteristic energies of individual elements. A radiation generator (X-ray tube) is used to induce radiation, and a spectrometer with a semiconductor detector is used to measure its spectrum. The device is intended for use in laboratories to analyze the parameters of material mixtures. The computer, which is an integral part of the device, allows it to be used in automated measuring stations. The PYLOX3 analyzer can work with external devices, e.g. a moisture analyzer.