Red Sea Seawater Salinity Refractometer DEF and an operation manual

and an operation manual

00              REST OF THE WORLD: $15

The design allows the user to easily wipe off the sample

This units uses ambient light

and then place the acrylic block on top and you are on your way

Red Sea Seawater Salinity Refractometer DEF and an operation manualRed Sea Seawater Refractometer Product #: RED R12018 REFURBISHED and have A FULL 3 YEAR WARRANTY! Red Seas Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC 77 0F. Most refractometers used within the aquarium hobby are not specifically designed for reef aquariums and use an algorithm for the measurement of brine (NaCl rather than seawater) and at a temperature of 15oC 59 0F