Review on TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis) by Dorota Sarwa ᠌

I liked that I didn't have to calibrate anything. It was embarrassing that the readings change, albeit slightly (within the table). On the other hand, if you need an accurate tester, then, apparently, you need to take a more serious device with calibration. Surprised that boiled water is more harmful than tap water))) My scores: - distilled water - 30 - boiled water (cooled) - 131 - tap water (without filters) - 125 - hot tap water (without filters) - 180