Hanna Instruments 

HI83399 Multiparameter photometer, with COD and (optional) digital pH

HI83399 Multiparameter photometer, with COD and (optional) digital pH

HI935005 K-Type Thermocouple Thermometer

HI98194/10 Multiparameter pH/ORP/EC/TDS/Salinity/DO/Pressure/ Temperature Waterproof Meter (10m cable)

HI98199 Multiparameter portable pH, EC, DO digital portable meter (pH electrode included only)

HI9829 Multiparameter pH/ISE/EC/DO/Turbidity Waterproof Meter with GPS option

HI991300 Portable pH/EC/TDS/Temperature Meter (Low Range)

HI991301 Portable pH/EC/TDS/Temperature Meter (High Range)

Industrial Flat Tip ORP Electrode - HI2004-1005

Iodine Checker® HC Calibration Check Set - HI718-11

Magnesium Hardness Checker® HC Calibration Check Set - HI719-11

Manganese High Range Checker® HC Calibration Check Set - HI709-11

Marine Ammonia Certified Standard kit

Marine Calcium Checker® HC Calibration Check Set - HI758-11

Marine Magnesium Certified Standard kit

Multiparameter pH/ORP/DO/Pressure/Temperature Waterproof Meter - HI98196