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Aquarium Refractometers
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Milwaukee Seawater Digital Salinity Aquarium Refractometer Specific Gravity Milwaukee Instruments Seawater (Salinity) Refractometer

Product Code: RMI00887
The MA887 Milwaukee Instruments Seawater (Salinity) Refractometer is an optical instrument that employs the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates. The digital refractometer eliminates the uncertainty associated with mechanical refractometers.

Our Price (price includes free shipping!) $114.00
In Stock
Red Sea Seawater Refractometer Red Sea Seawater Refractometer

Product Code: RRS12018
Red Seas Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 77F. 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 59F rather than 77F.

Our Price: $67.49
In Stock Reefractometer AccuraSea Package Reefractometer (aka Refractometer) & AccuraSea Package

Product Code: RMR90001-Bundle
With the Reefractometer (aka Refractometer) & Two Little Fishies AccuraSea Package you can be absolutely certain your salinity is perfect.

Our Price: $36.99
In Stock
The Reefractometer Refractometer is designed specifically for marine and aquarium salt water Reefractometer (aka Refractometer)

Product Code: RMR90001
The Reefractometer is designed specifically for marine and aquarium salt water. The readout is for 0-40 PPT, which is much easier to read than the 1-100 PPT that comes with many refractometers that are for general use. The refractometer also features ATC (automated temperature compensation) so you don't need to adjust your reading.

  • Includes dropper and screwdriver for calibration adjustments
  • We recommend calibrating your Reefractomer with AccuraSea Seawater Calibration Solution
  • Specifically designed for the ionic content of seawater (NSW) for more accurate salinity measurement (industry standard refractometers are calibrated for salt brine)
  • Calibrated for seawater (NSW) at 77 F, the normal temperature range for reef aquariums ( most standard refractometers are calibrated at 59F).
  • Easier to read, higher resolution display, focused to the relevant range for reef aquariums of up to 40 ppt
  • Includes Integrated Automatic Temperature Compensation (ATC) for accurate measurement at standard ambient temperature.

Our Price: $24.99
In Stock
Two Little Fishies AccuraSea 250 ml Two Little Fishies AccuraSea, 250 ml

Product Code: RTL50700
With Two Little Fishies AccuraSea you can measure your salinity precisely. AccuraSea seawater reference solution is the only calibration solution of its kind made from real seawater. Its pure natural sea water micron filtered and UV sterilized then adjusted with reverse osmosis water to the standard S = 35 or conductivity of 53 mS/cm at 25C (77F). Use it to accurately calibrate seawater refractometers and check the accuracy of swing-arm hydrometers.

Our Price: $12.04
In Stock
Pinpoint Salinity Calibration Fluid American Marine Pinpoint Salinity Calibration Fluid

Product Code: RAM00601
The American Marine Pinpoint Salinity Calibration Fluid 53.0 mS is a standardized fluid for calibrating refractometers and the American Marine PinPoint Salinity Monitor.

Our Price: $9.79
In Stock