The task of the final work was to investigate the devices for measuring the moisture. Describe and explain the principles of the different measurement procedures and show examples of measuring devices from different manufacturers and compare them. The difference between the measurement devices are manifested in different principles of measurement, for different purposes, as well as differences in the quality measuring devices. Necessary are views of measuring devices with the best possible accuracy and reliability. The largest of the apparatus for measuring humidity in industrial plants and production processes. With the advancement of technology, improve the conditions of these devices and connect the systems of control and management and automation technology. How to connect and control some of the larger systems that control a variety of processes is described in more detail in the elaboration of the final work. The goal of automation is to improve the full integration of control, drive and technological functions of the entire production system. Analysis of the final paper provides a description of all terms, diagrams, images and expressions that include a branch of measuring humidity. Materials used in the preparation of work are taken from the list of references.