Refractometers

How to use a refractometer

A seawater refractometer uses the refraction of light in liquid to measure specific gravity. Place a few drops of water under the refractometer lid, close the lid, and point it at a light source. Look through the eyepiece for a change in color created by refracted light. The line will run through a chart inside the eyepiece that indicates the specific gravity.


A digital refractometer is even more precise than a mechanical refractometer.


Another option is a digital water tester, a handheld meter that combines a thermometer and salinity tester to make water changes a breeze

IceCap Salinity/Temperature Digital Pocket Tester
New
2020-09-01
130
sale
-7 %
Based on  reviews.
70.00JD 75.00JD
AquaMaxx REEFractometer Refractometer
New
2020-09-01
130
sale
-7 %
Based on  reviews.
50.00JD 54.00JD
Marine Depot Aquarium Refractometer
New
2020-09-01
130
sale
-8 %
Based on  reviews.
37.00JD 40.00JD

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