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Red Sea Seawater Refractometer

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Red Sea

High Accuracy Seawater Refractometer!

Red Sea’s Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25°C/77°F.

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 15°C/59°F rather than 25°C/77°F. Thus, a measurement deviation of up to 1.5ppt is possible, which can have a significant adverse effect on coral growth and coloration.

Main features of Red Sea’s Seawater Refractometer include:

  • Directly reads the absolute salinity of seawater at 25°C/77°F ( No need for seawater or temperature compensation factors)
  • 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 25°C/77°F, the normal temperature range for reef aquariums (most standard refractometers are calibrated at 15°C/59°F ).
  • Easier to read, higher resolution display, focussed to the relevant range for reef aquariums of up to 40ppt
  • Includes Integrated Automatic Temperature Compensation (ATC) for accurate measurement at standard ambient temperature.
Red Sea’s Refractometer display
The PPT scale on Red Sea’s Seawater refractometer is calculated using an algorithm for seawater and therefore will give a reading of the Absolute Salinity of seawater.

The PPT scale on regular salinity refractometers are calculated using an algorithm for Brine. Using a Brine refractometer for Seawater will give an error of approximately 1.5ppt in the salinity reading.










Product Manuals & Documentation

Red Sea Seawater Refractometer

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

With a dedicated team of scientists and other professionals, Red Sea is widely recognized as a leading innovator and manufacturer of quality products for aquarium hobbyists. Red Sea constantly strives to provide hobbyists of all levels with highly effective solution-driven products designed to make your fish-keeping experience as enjoyable and successful as possible.

The embodiment of Red Sea’s dedication to providing solutions for today’s reef-keepers is its range of MAX-NANO, MAX-E & MAX-S aquariums- The only choice for true Plug & Play™ coral reef aquariums, now featuring the very latest in LED lighting technology.

For advanced reef-keepers the Red Sea REEFER provides a great platform into which you can add your own selection of hardware. With its ultra-clear glass, ATO built-in, silent flow valve and superb quality of finish the REEFER sets the standard for those wishing to customize. REEFER is also available as a Deluxe version with LED lighting included.

Red Sea’s unique Reef Care Program (RCP) provides a comprehensive, safe and easy to use program for testing and supplementing within reef aquaria, and is perfectly complemented by Red Sea’s Coral Pro & Red Sea Salt’s, which has become the salt of choice for those seeking the very highest quality water quality for their coral reef aquariums. Both salts are made using a unique natural process which delivers unrivalled homogeneity and is perfect for delicate corals. Check your individual bucket of salt’s composition using Red Sea’s innovative new “MyBatch” software.

Whatever your aquatic needs, Red Sea delivers high quality innovative, solution based products.

10 Reviews

PEDRO SOSIAS from CANOVANAS, PUERTO RICO

10/11/2016

Experience Level: Intermediate

Refractometro

Excetente funciona muy bien

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SCOTT from WOODLAND HILLS, CA UNITED STAT

01/31/2016

Experience Level: Expert

Complete Trash

I have experience with a dozen or so of these instruments over the past 20 years. This refractometer does not provide repeatable measurments. Calibrated using 35 ppt standard solution. Rechecking after a few as a five minutes and the calibrated reading "drifts" as much as 5 ppt or more. Measurments are completely unreliable and potentially dangerous in a reef system.

1 out of 1 found this review helpful

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PAUL VOLANTI from MISSION VIEJO, CA UNITED STATE

01/13/2016

Experience Level: Intermediate

Refractometer

Easy to use and very convenient. Works great and is consistent. No more guessing.

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Join the Revolution from Silver Spring, MD UNITED STATE

01/12/2016

Experience Level: Expert

does not hold calibration

Buyer beware- this instrument needs to be calibrated with heated 77F calibration. If not it will not hold calibration. No, thank you.

2 out of 2 found this review helpful

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DANIEL CULLUM from JONESBORO, AR UNITED STATES

04/12/2015

Experience Level: Beginner

Quality product, easy to use

Title says it all. Quality product and easy to use.

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TROY from GOLDEN, CO UNITED STATES

03/27/2015

Experience Level: Beginner

Perfect

Very easy to use, I love it :)

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TROY from GOLDEN, CO UNITED STATES

03/27/2015

Experience Level: Beginner

Perfect

Very easy to use, I love it :)

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Tony C. from ELKRIDGE, MD UNITED STATES

03/14/2015

Experience Level: Beginner

Red Sea Refractometer

I've had it for about 3 weeks now and seems to work rather well. It seems to be well made and is easy to use. I'd recommend it

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JOHN WERBICK from LAS VEGAS, NV UNITED STATES

02/16/2015

Experience Level: Intermediate

Love this Refractometer

this unit is great. The large scale for marine salinity makes reading the values super easy. So far the temperature for calibration seems to keep the need for calibration much less frequent. I have been using refractometers for 4 years now, and this one makes the job so much faster and easier to get accurate readings.

4 out of 5 found this review helpful

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GERAUD KRAWEZIK from NEW YORK, NY UNITED STATES

01/11/2015

Experience Level: Expert

High quality product

Very good product: the fact that it is meant to be read for 25 degrees (most other products are set to 20) makes it a breeze to calibrate with reference solutions. The screen itself is very clear to read. The range is limited to 1010-1030 sg, making it perfect for the kind of salinity we are targeting in reef aquarium, aka easier to get a precise reading! The only annoying thing is the protection for the little "setup screw" would be better if it was attached to the body, it looks like it could easily get lost.

2 out of 2 found this review helpful

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