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Refractometers

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D-D H2Ocean Seawater Refractometer
Based on 3 reviews.
Almost all, if not all, of the refractometers currently available to the aquarium hobby are designed for measuring saltwater (sodium chloride or brine solution) and not true ‘seawater’. Although seawater is mostly sodium chloride it also contains other elements such as magnesium and calcium that change the refractive index slightly and will give a slightly different result. ..
$59.99
Red Sea Seawater Refractometer
High Accuracy Seawater Refractometer Red Sea’s 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 t..
$64.99
Pinpoint Salinity Calibration Fluid
Keep your refractor or salinity monitor calibrated with Pinpoint's Salinity Calibration Fluid. 53.0 mS standardized fluid with conversion chart. ..
$8.99
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