pH/TDS/Salt Meter, pH Range 0.00 to 14.00, Electric Conductivity Range 0 to 199.9 uS (Conductivity), 200 to 1999 uS, 2.0 to 19.9 mS, 0 to 9,999ppm (TDS), 0-9,999 ppm (Salinity), TDS Range 0 to 99.96 ppm, 1.0 to 9.99 ppt, 100 to 999 pm, Waterproof Yes,...