Refractometers & Hydrometers
Offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC/77 0F.
Temperature compensating refractometer with LED illuminated scale for salinity determination
Use the Aqua One Glass Hydrometer to measure the density of salt within your aquarium.
Hand held instrument for the measurement of the true Salinity and Specific Gravity (S.G.) of sea water by refractive index.
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