
Phosphate handy photometer
Range: 0.00 to 2…

Phosphate (Low Range) Professional Photometer

Pocket TDS Pen, Range: 0 to 1990 ppm

pH / Temperature Meter, 0.1 pH Resolution, replac…

Economical Pocket size pH Tester

Range: 0 to 1990 uS/cm

Range: 0 to 1990 μS/cm

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

EC: 0 – 3999 uS/cm, TDS: 0 – 2000 ppm

Standard Portable pH Meter with 0.01 pH resolutio…

pH: 0.0 to 14.0 pH, EC: 0 to 1990 uS/cm, TDS: 0 t…

Digital Refractometer for Seawater Measurements

Standard Portable DO Meter
O2 Range: 0.0 to…

Ammonia (Medium Range) Professional Photometer

Ammonia (Low Range) Professional Photometer
…

Free & Total Chlorine Professional Photometer…