Testing water with a TDS tester from 3 different filter sources.

A TDS meter is a small hand-held device used to indicate the Total Dissolved Solids in a solution, usually water. Since dissolved ionized solids, such as salts and minerals, increase the conductivity of a solution, a TDS meter measures the conductivity of the solution and estimates the TDS from that reading.

Let’s test from two filter sources and the city water of Brazil.

Seems almost all 3 read the same. How weird is that?