TDS refers to the total amount of dissolved solids in milligrams per liter, indicating how many milligrams of dissolved solids are dissolved in 1 liter of water. The higher the TDS value, the more impurities contained in the water.
Purified water is drinking water obtained by filtering bacteria, most heavy metals and impurities in water.
When the TDS value of water quality test is above 50, it can be drunk directly. TDS is the abbreviation of total dissolvedsolids, which is the total amount of dissolved solids in water. The more substances dissolved in water, the greater the TDS value, which can be measured by indirectly measuring the purity of water quality through resistance.
Pure water is an insulator. In the natural state, water is rich in inorganic salts and organic substances and becomes a conductor. The more salt substances in water, the higher the conductivity in water. TDS value is the total amount of conductive substances in water. TDS value can not directly reflect the quality of water, because the conductivity of substances in water is the sum of harmful characteristics and beneficial substances.