What is EC/TDS ?
EC/TDS are two different formulas that are used to measure the strength or concentration of a nutrient solution. The difference between the two measurements is EC uses the metric system and TDS is a standard measurement used mostly in The United States.
EC the Electrical Conductivity is measured by the mS/cm or the amount of MiliSiemens per Centimeter. TDS stands for Total Dissolved Solids which is a measurement of PPM or Parts Per Million.
Both EC/TDS measurements are used by many nutrient manufactures and breeders world wide. It can be a little confusing at first, as EC is only one formula and answer. Where there are two different formulas to determine the TDS. Therefore, There will be two different answers. None is them are necessarily better than the other, but all are about as accurate as can be. Just pick one and stay with it, to avoid any confusion.
How To Measure EC/TDS
Just like PH pens, there are EC/TDS pens that can be bought. The easiest way to keep track of these measurements is to get a PH/Conductivity Pen. These are a little more expensive, but very handy to someone keeping track of all measurements. They measure PH, EC/TDS in both formulas, and temperature. Very easy to use, push mode button to desired measurement and stick tip of pin in nutrient solution to see results. Record data and monitor every aspect of the Cultivation process.