... precision 4. Easy to operate 5. CE certificate Household hand tool set: TDS meter + water electrolyser Products function:A) TDS meter: ... , food processing, physics & chemistry teaching, water treatment, cosmetics, wine, home, office, travelling and more.DisplayLCD, 34mm x 17mm VoltageCR2032 Battery ... emissions on the table. Then, put two ends of the tool into two cups, press the button ON, the test ...