Not bad, but ehr a capped conductance so Conductivity Tester

EZ TDS-3 is something fehleitend because there is also a similar device for conductivity
but this is Total Solids, I trust not him so completely since the TDS value always has exactly changed equivalent to conductance, is the 20% Rauf is also the conductance by 20%, I would say it is simply a conductivity meter with conversion factor 0, 5xLeitwert = Total Solids. So who has been an EC Meter does not need this TDS meter.
It is also fully komen legitimate to consider anyway for dilute solutions as osmosis or AQ water but at high concentrations is that ... sorry Bulls *** !!
... Because the may only be used in small measuring range is therefore equivalent to a conductivity meter.

Messerte to osmosis system (TDS = 22), AQ-water (TDS = 125-130) sound credible.

Am satisfied when I fed increases the TDS by about a few points. or about every day to about 5 points for a partial water changes until it is stable then. For the price ok considering it just an EC-meter with Umrechnungsfaktor0.5 is.