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At AquaCave, we offer some of the best selection & best prices on Salinity Refractometers for Marine and Reef Aquariums for you marine, reef, and freshwater aquarium.
Refractometers are precision optical instruments used for measuring aquarium water salinity. They work using principle of light refraction through liquid. When passing light through a liquid the refracted angle will be shown on the scale determining the amount of salt in the water. Very easy to use; simply place one drop of water on the prism and read the results on the scales immediately. They have adjustable focus, easy to read numbers for good resolution, and zero adjustment screw for calibration. These refractometers have Automatic Temperature Compensation feature and are suitable for application where the temperature of the samples vary.

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  • Milwaukee MA887 Digital Refractometer Milwaukee MA887 Digital Refractometer Milwaukee MA887 Digital Refractometer Milwaukee MA887 Digital Refractometer Milwaukee MA887 Digital Refractometer

    Milwaukee Instruments

    Milwaukee MA887 Digital Refractometer

    Milwaukee MA887 Digital RefractometerThe MR series refractometers are precision optical instruments used for measuring aquarium water salinity. They work using principle of light refraction through liquid.Specifications:Range: PSU: 0 - 50 PPT: 0 -...

    $142.00
  •  Pinpoint Salinity Monitor

    Pinpoint - American Marine

    Pinpoint Salinity Monitor

    Pinpoint Salinity Monitor by American MarinePINPOINT Salinity Monitor™ will accurately and immediately measure the amount of salt in any marine or freshwater system. The reading is fully temperature compensated, which is difficult or...

    $119.95
  • Hanna Instruments Marine Salinity Tester Hanna Instruments Marine Salinity Tester Hanna Instruments Marine Salinity Tester Hanna Instruments Marine Salinity Tester Hanna Instruments Marine Salinity Tester

    Hanna Instruments

    Hanna Instruments Marine Salinity Tester

    Hanna Instruments - Marine Salinity Tester Designed to bring simplicity to salinity testing during the any process, the HI98319 Marine Salinity Tester measures conductivity (EC) to determine the salinity of natural and artificial seawater. Within...

    $79.99
  • Red Sea Seawater Refractometer, High Accuracy Red Sea Seawater Refractometer, High Accuracy

    Red Sea

    Red Sea Seawater Refractometer, High Accuracy

    Red Sea Seawater Refractometer (Reef Spec) High Accuracy 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...

    $74.99
  • IceCap Salinity/Temperature Digital Pocket Tester v3 IceCap Salinity/Temperature Digital Pocket Tester v3

    IceCap

    IceCap Salinity/Temperature Digital Pocket Tester v3

    IceCap Salinity/Temperature Digital Pocket Tester v3 The IceCap Digital Pocket Tester is a portable, rugged, water resistant device that utilizes electric conductivity to determine the specific gravity/salinity of natural and artificial seawater...

    $71.49
  • Deluxe LED Salinity Refractometer with ATC Deluxe LED Salinity Refractometer with ATC Deluxe LED Salinity Refractometer with ATC

    AquaCave

    Deluxe LED Salinity Refractometer with ATC

    Deluxe LED Salinity Refractometer with ATC Easy to use LED powered lens. For the most precise measurement of salinity, the experts use a Refractometer. This high-tech instrument is used to measure salinity when perfect conditions are needed for...

    $39.95
  • Tropic Marin Hydrometer Tropic Marin Hydrometer

    Tropic Marin Hydrometer

    Tropic Marin Hydrometer NOTE: The specific gravity is temperature dependent. With increasing temperature the specific gravity decreases. Therefore, the measured water temperature should be 25 °C / 77 °F to obtain a correct result.For an...

    $36.99
  • Hanna Salinity Tester Calibration Solution. 25 Sachets Hanna Salinity Tester Calibration Solution. 25 Sachets

    Hanna Instruments

    Hanna Salinity Tester Calibration Solution. 25 Sachets

    Hanna Salinity Tester Calibration Solution. 25 Sachets HI70024P is a premium quality 35.00 ppt salinity calibration solution standardized with a conductivity meter that has been calibrated with  potassium chloride NIST 2202 SRM (Standard Reference...

    $32.00
  • Deluxe Salinity Refractometer with ATC Deluxe Salinity Refractometer with ATC Deluxe Salinity Refractometer with ATC

    AquaCave

    Deluxe Salinity Refractometer with ATC

    Deluxe Salinity Refractometer with ATC For the most precise measurement of salinity, the experts use a Refractometer. This high-tech instrument is used to measure salinity when perfect conditions are needed for breeding, or keeping very delicate corals...

    Was: $34.95
    Now: $29.95
  • Fluval Sea Hydrometer Fluval Sea Hydrometer

    Fluval

    Fluval Sea Hydrometer

    Fluval Sea Hydrometer Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Regular testing is strongly recommended as stable salinity levels are essential for the health of...

    $12.95
  • Pinpoint Salinity Calibration Fluid  53.0mS / 1.026 SG Pinpoint Salinity Calibration Fluid  53.0mS / 1.026 SG

    Pinpoint - American Marine

    Pinpoint Salinity Calibration Fluid 53.0mS / 1.026 SG

    Pinpoint Salinity Calibration Fluid 53.0mS / 1.026 SG Insure a perfect reading with your American Marine Salinity Meter- This salinity calibration fluid sets your system at the precise reading you need. 53.0mSPinpoint Salinity Calibration Fluid 53.0mS /...

    $8.95
  • 5 ml. Transfer Pipette

    EcoPlus

    5 ml. Transfer Pipette

    5 ml. Transfer Pipette Unbreakable all-in-one pipets eliminate the hazards of broken glass and exposure to infectious materials. Put an end to matching rubber bulb with glass pipet. Since entire unit is disposable, these pipets prevent...

    $0.49
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