
Pocket TDS Pen, Range: 0 to 1990 ppm

Pocket TDS Pen, Range: 0 to 10000 ppm

Waterproof TDS Tester, Range: 0 to 1999 ppm (mg/L…

Waterproof TDS Tester, Range: 0 to 9990 ppm

Economical Pocket size pH Tester

Waterproof pH Tester, 0.1 pH Resolution, Replacea…

Waterproof pH Tester, 0.01 pH resolution Replacea…

pH / Temperature Meter, 0.1 pH Resolution, replac…

Range: 0 to 1999 uS/cm

Range: 0.00 to 10.00 mS/cm

Range: 0 to 1990 uS/cm

EC: 0 – 3999 uS/cm, TDS: 0 – 2000 ppm

EC: 0.00-20.00 mS/cm, TDS: 0.00-10.00 ppt

Standard Portable pH Meter with 0.01 pH resolutio…

Range: 0 to 1990 μS/cm

TDS tester, Range : 0 to 1990 mg/L (ppm)