producing and selling the products: TDS Meter, PH Meter, ORP Meter, Conductivity Meter, Water quality electrolysis apparatus, The electrolyser water, PH Test agent, OTO Test solution, PH test liquid, hardness test reagents, calcium and magnesium reagents, without water leakage intelligence, Water Quality Detector, Water Quality Demonstrator, water analysis boxes, water analyzer, water quality testing tool products.