9 scientific apparatus and instruments for water analysis, namely water sampling devices, automatic water dosing apparatus, flow meters; apparatus for measuring and indicating the volume, PH level, conductivity, temperature, dissolved oxygen, turbidity, redox, toxicity and chemical content of water; water sampling devices; water level gauges; devices for analyzing the chemical composition of water and the presence of contaminants in water; water viewing apparatus, namely microscopes, glass containers, magnifying glasses, distilling apparatus for scientific purposes; accumulators; water temperature indicators, namely thermometers; thermostats and computer software for water analysis