Review on TDS Meter (salt meter) electronic - TDS-3 by Micha Gozdalik ᠌

I tested this miracle in different water with different filtration. The water from the tap showed the device in three measurements from 223 to 320. I deduced the average for the classics of the genre) after the aquaphor filter with three stages of filtration and mineralization, it showed values ​​​​in the region of 29 ppm (also three measurements, but the spread was only 7- 10 units). There is an error, but I don’t live in a laboratory either, my own)) I think it’s suitable for domestic needs