Salinity Tester - digital Salinity tester  The waterproof HI98319 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 natural and artificial seawater. Ideal...

D-D/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 determinate salinity. Includes: Density hydrometer260mm long + measuring cylinder

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