Red Sea Saltwater Refractometer
Achieve precise and reliable salinity measurements with the Red Sea Saltwater Refractometer — a premium-grade instrument designed specifically for marine and reef aquariums. Unlike standard refractometers, this model is calibrated for natural saltwater, ensuring the most accurate readings for your tank.
Product Features
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Saltwater Calibrated: Provides true salinity readings based on the ionic composition of seawater (not brine).
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High Precision: Measures salinity from 1.000 to 1.070 SG (0–40 ppt) with exceptional accuracy.
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Easy to Read: Features a clear, high-contrast scale for quick and simple readings.
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Automatic Temperature Compensation (ATC): Ensures accurate results even with temperature variations.
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Durable Design: Rugged metal body with soft rubber grip for comfort and stability.
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Protective Case Included: Comes in a padded box with dropper, calibration screwdriver, and instructions.
Specifications
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Type: Optical Seawater Refractometer
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Range: 1.000–1.070 SG / 0–40 ppt
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Accuracy: ±0.001 SG / ±1 ppt
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Calibration: Using RO/DI or distilled water
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Temperature Compensation: Automatic (ATC)
Why Choose the Red Sea Refractometer?
Unlike many generic refractometers designed for brine or industrial use, Red Sea’s model is engineered for marine aquariums, making it ideal for reef keepers who need dependable, repeatable readings. Perfect for maintaining stable salinity — the foundation of coral and fish health.
How to Use
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Place a few drops of tank water on the prism.
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Close the daylight plate and look through the eyepiece toward a light source.
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Read the salinity directly on the scale.
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Rinse with RO/DI water and dry after each use.
Maintain perfect salinity with confidence — the Red Sea Refractometer is the trusted choice for serious marine aquarists.
