Your Basket

0 items - £0.00


Red Sea Refractometer

Barcode: 7290100774830   |   Manufacturers Code: R12018

Our Price £47.99
Print page

Feefo star rating Based on
In Stock

Standard Delivery (£3.95) (Orders of over £50 are delivered free)


Check availablility then telephone store to reserve products for collection

Store Stock Telephone Details
Rayleigh Out of Stock 01268 781265 store details
East Harling In Stock 01953 718184 store details
Gravesend In Stock 01474 561123 store details
Colchester In Stock 01206 242521 store details
Previous Next

Product Specification

Red Sea Seawater Refractometer

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 Fahrenheit)

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 sea water at 25C/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 25C/77F, the normal temperature range for reef aquariums(most standard refractometers are calibrated at 15C/59F ).

Easier to read, higher resolution display, focussed to the relevant range for reef aquariums of up to 40pptIncludes 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.


 Red Sea’s Seawater refractometer red sea seawater refractometer. salinity test for saltwater aquariumsrefractometer

             Red Sea's Seawater Refractometer Display                                                                   Typical Salinity Refractometer Display

FeeFo Reviews

1 review(s)

Date Score Comments
03-Mar-2017 Product

10 out of 10 the best ihave purchase
  • Free UK delivery
  • Trusted service
  • No hassle returns
  • Trusted dealers