Water Conductivity, Electrical Conductivity And TDS Editorial Photo

Water conductivityPure water is not a good conductor of electricity. Ordinary distilled water in equilibrium with carbon dioxide in the air has a conductivity of about 10 x 10-6 W-1*m-1 20 dS/m. Because the electrical current is transported by the ions in solution, the conductivity increases as the concentration of ions increases.Thus conductivity increases as water dissolved ionic species.Typical conductivity of waters:Ultra pure water 5.5 · 10-6 S/mDrinking water 0.005 – 0.05 S/mSea water 5 S/mElectrical Conductivity and TDSTDS or Total Dissolved Solids is a measure of the total ions in solution. EC is actually a measure of the ionic activity of a solution in terms of its capacity to transmit current. In dilute solution, TDS and EC are reasonably comparable. The TDS of a water sample based on the measured EC value can be calculated using the following equation:TDS mg/l = 0.5 x EC dS/m or mmho/cm or = 0.5 * 1000 x EC mS/cmWith the reverse osmosis process, water is forced into a semi-impermeable membrane leaving the impurities behind. This process is capable of removing 95-99 % of TDS, providing pure or ultra-pure water.