Ecological Systems and Devices Annotation << Back PHYSICAL AND CHEMICAL BASES OF ECOLOGICAL SYSTEMS SAFETY L.P. Mileshko The purpose of this paper is to analyze the possibilities of applying various methodological approaches in security systems. A fundamental increase in the safety of environmental systems can be achieved by reducing the negative impact of the technosphere on them through the widespread use of the best available technologies. It is proposed to expand the range of technical characteristics of a multi-sensor system for environmental monitoring of water and soil environments by additional determination of ions: K+, Ca2+, Ag+, F–, Cl–, Br–, I–, Li+, Na+. It is claimed that the neural network methodology is designed to increase the reliability of information in security systems based on multi-sensor systems for environmental monitoring of water and soil environments. Keywords: safety; security system; ecological system. DOI: 10.25791/esip.05.2021.1226 Pp. 16-19.