TDSIt's in English.Completely dissolved.The abbreviation for "total dissolved solids" refers to the sum of inorganic salts and organic substances dissolved in water. The main components include calcium, magnesium, and sodium; potassium ions and carbonate ions; hydrocarbons, chloride ions, sulfate ions, nitrates, etc.TDSThe count is a solid volume tester for soluble substances.TDSThe unit of account is...ppm (parts per million)(i.e.,mg/L), which is defined as the conductivity value of a proportional number, generally taken0.7Around.TDSThe baseline temperature for automatic temperature compensation is generally25℃, 温度系数通常2% / %. This instrument is waterproof. Waterproof level.IP55 At the same time with temperature, temperature readings are keyed to switch between degrees centigrade and Fahrenheit.