Digital PH/TDS/EC Meter Tester Thermometer Pen Water Purity PPM Range 0-9999 Fil
Save power, extend battery life. Well, the only way to make sure your water is clean and healthy is to test it regularly. 4 Display modes: press SHIFT button: TDS - ppm & °C, EC - μs/cm & °C, TDS - ppm & °F, EC - μs/cm & °F.