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Use the HI736 Checker photometer for phosphor ULR to detect and prevent phosphate in aquariums.

HI98199 Multiparameter pH/Conductivity/Dissolved Oxygen Meter with pH Probe. Optional DO and EC electrodes are available.

The HI9814 is a lightweight and waterproof portable meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature with a single reinforced electrode

The HI98198 Optical Dissolved Oxygen Meter makes measuring the concentration of dissolved oxygen hassle-free.

The Hanna Ammonia Low Range Checker bridges the gap between simple chemical test kits and professional instrumentation.

With HI7698194/4 probe and 4m cable

HI991300 Water-resistant pH / EC / TDS and temperature Multiparameter

The HI99300 Water resistant meter (EC, up to 3999 μS/cm), TDS and temperature is a handy meter for in the field you can read out immediately.

The HI713-25 are the replacement reagents for the HI713 Phosphate Low Range Checker® HC.

The HI 98192 is a portable measuring instrument that can measure conductivity, resistivity, TDS, NaCl and temperature

The HI991001 pH/Temperature Meter is designed specifically for use in manufacturing and environmental testing protocols

HI98303 DiST®3 Waterproof EC Tester (0-2000 µS/cm)

HI772-26 Seawater alkalinity reagents 0.0 to 20.0 dKH, 25 Tests

HI70024P Calibration Solution Salinity 35.00 ppt for the HI98319 Salinity Tester in Seawater

HI99121 Direct Soil Measurement pH/Temp Portable Meter with elektrode HI12923 and DIN-connection.

The HI83399 is a compact, multi-parameter photometer for measuring the most important parameters of the quality of water and waste water.

HI781 Checker photometer for Nitrate LR in Saltwater starter kit with reagents and 2 cuvettes

Designed for storing any pH or ORP electrode.

HI758-26: Marine Calcium Checker reagents, 25 tests

The HI98190 is a user-friendly instrument with a large graphic and illuminated display.

HI98304 DiST®4 Waterproof EC Tester (0.00-20.00 mS/cm)

Waterproof pocket size EC/TDS/temp.-tester, 20 mS/cm - 10 ppt (DIST6)

HI991301 Water-resistant pH / EC / TDS and temperature Meter

This pocket-sized photometer is specially designed for the determination of alkalinity or KH in fresh water.