The manual discusses methods for measuring the density of bulk materials. Known methods allow obtaining a reliable result by separate measurement of the volume and mass of the bulk material sample with subsequent division of the obtained data. The features of the most simple and reliable gauge and pneumodynamic methods of density measurement implementing the substitution principle. are considered. In a number of methods, the mass, volume and density of the bulk material are measured in a single measuring process. Designs of automatic density control devices. are described Designed for students of the specialty "Automation of technological processes and productions" for independent work in the study of the discipline "Technical measurements and devices" , Coursework and diploma projects , In addition to , it will be useful to a wide range of engineering and scientific workers, engaged in the development and design of methods and means of control and measurement of the composition and properties of substances