TDS Meter

Home > Analytical Instrument > TDS Meter

A TDS Meter is a very useful device found in a laboratory environment. The primary purpose of this device is to detect total dissolved solids (TDS) of a solution, hence the name given T.D.S. Meter. In such a solution, dissolved ionized solids such as salts and minerals increase the conductivity of a solution. Thus, a TDS meter calculates the conductivity of the solution and estimates the TDS from that.

There are solutions in which dissolved organic solids such as sugar and microscopic solid particles such as colloids do not significantly alter the conductivity. Hence, TDS meter does not include such solutions in its reading. A TDS meter usually displays total dissolved solids in parts per million (ppm). For example, a TDS reading of 1 ppm would infer that there is 1 milligram of dissolved solids per kilogram of water.