- Directly reads the absolute salinity of seawater at 25°c/77 0f ( no need for seawater or temperature compensation factors)
- Specifically designed for the ionic content of seawater (NSW)
- Calibrated for seawater (NSW) at 25oc/77of (most standard refractometers are calibrated at 15oc/59of )
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 temperature of 15oC/59 0F rather than 25oC/77 0F. Thus, a measurement deviation of up to 1.5ppt is possible, which can have a significant adverse effect on coral growth and coloration.
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