Ecological Systems and Devices Annotation << Back METROLOGICAL BASE FOR ENSURING THE SAFETY OF WATER AND SOIL ECOLOGICAL SYSTEMS L.P. Mileshko The purpose of this work is to analyze possible ways to build a universal multisensory system capable of comprehensive environmental monitoring. It is noted that the state of security of ecological systems, characterized by the level of protection from environmental hazards, is evaluated by the results of measurements of numerous environmental parameters. From this point of view, metrological tools that allow simultaneous measurements of several characteristics of water and soil environments have a clear advantage over devices for single-parameter measurements. A new generation hardware and software package containing arrays of gas sensors and ionselective electrodes for synchronous analysis of air, water and soil quality is proposed. This requires appropriate adjustments to machine learning and neural network modeling techniques compared to the previous model. Keywords: Metrology; safety; environmental system; multi-sensor system. DOI: 10.25791/esip.09.2021.1251 Pp. 39-41.