Salinity Testers

Refractometers, hydrometers and other testing and checking equipment for measuring salinity in the marine reef aquarium.


Fluval Sea Hydrometer

Regular price £6.24 £9.49
Fluval Sea Hydrometer Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Compact and easy to use, the hydrometer can be permanently installed inside the tank for continuous readings....

Red Sea Refractometer

Regular price £43.19
Red Sea Refractometer Main features of Red Sea’s Seawater Refractometer include: Directly reads the absolute salinity of seawater at 25°C/77 0F  ( 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...

D-D True Seawater Refractometer

Regular price £36.95
D-D True Seawater Refractometer A hand-held instrument for the measurement of the TRUE Salinity and Specific Gravity (S.G.) of seawater by refractive index.What is different about the D-D Seawater Refractometer?Almost all handheld saltwater refractometers available to the hobby are...

JBL hydrometer

Regular price £29.99
JBL hydrometer Hydrometer for saltwater aquariums Suitable for use in scientific contexts: hydrometer with stable stand, thermometer and measuring vessel Convenient to use: half fill the measuring vessel with saltwater, insert the clean hydrometer, read off values after 1...

TMC V2 Refractometer

Regular price £37.95
The TMC refractometer comes in a sturdy plastic storage case and has the following features.   Automatic temperature compensation.High resolution, dual scale - SG and PPT.Simple focus adjustment.Wipe-clean lens.Easy to calibrate using screwdriver supplied.Simple water application using pipette supplied....