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...

Salinity guardianModern smart devices - apart from the traditional functionalities offered by other products, deliver numerous improvements in aquarium management, ensure safety and give access to important information, safeguarding the health of the animals kept...

Precision density hydrometer to determinate salinity. Includes: Density hydrometer260mm long + measuring cylinder