Salinity Tester - digital Salinity Tester Our new HI-98319 waterproof salinity and temperature Tester is perfect for any Saltwater aquarium. A more accurate alternative to refractometers, this Tester uses conductivity to determine salinity levels of...

DD/ATC Seawater Refractometer The vast majority of refractometers currently available to the Hobby are designed for measuring Saltwater (sodium chloride or brine solution) and not true 'seawater'. Although seawater is mostly sodium chloride it also...

Precision density hydrometer to determine salinity. Includes: Density hydrometer 260mm long + measuring cylinder

The HI-96822 digital refractometer is a rugged, portable, water resistant device that uses the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates. The HI-96822...