Drinking water supply, water supply, reservoir and pumping station, etc. Chemical acid, lye, conductive solution, cooling fluid, additives, etc. Beer, wine, alcohol, milk, fruit juice, syrup, etc. Refrigeration / air conditioning and refrigeration thermal measurement, or heat energy. Sewage, industrial sewage discharge, etc. Control of metal industrial pump, cooling water and the flow of water. The textile industry of water, pigments, chemicals, bleaching chemicals, etc. AUTO INSTRUMENT / 23