HM Digital, Handheld TDS Meter
HM Digital - Handheld Electronic (TDS), Spot-Free Water Quality Tester
Spot-Free Water Quality Tester
Instantly test your spot free water quality now. Results shown on (LCD) digital display.
Spot-Free Water quality that is below 20.0 (ppm), Parts per Million as measured by a TDS meter, is perfect free vehicle washing/rinsing.
Spot-Free Water Quality that is 10.0 (ppm), Parts per Million is the industry standard and perfect for window and solar panel cleaning.