1-714-385-0080

Mon-Thurs 7am-5pm PST
Fri 7am-4pm PST

Questions about products, orders, shipping?
Contact us by call or email
customercare@marinedepot.com

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.

Filters


Hanna Instruments Salinity Tester (HI98319)
Marine Depot Aquarium Refractometer
Milwaukee Seawater Digital Refractometer

$124.99

AquaMaxx REEFractometer Refractometer
Red Sea Refractometer
Hanna Instruments Digital Seawater Refractometer