Refractometer for measuring seawater (saltwater).

OPTi digital refractometer for Seawater/saltwater

Regular price £235.00 Sale

This dual scale refractometer has been designed for the measurement of seawater/saltwater. It comes programmed with both Seawater PPT (parts per thousand) and Seawater Specific Gravity (SG) scales, making it ideal for testing water in saltwater aquariums without the need for additional calculations.

The design of the OPTi digital refractometer makes testing salt water aquariums easy. Simply use a pipette to apply a very small sample to the easy clean prism dish and press “read”. The OPTi will give you your reading. No mess. No ambiguity.

OPTi refractometers are Made in the UK using stainless steel injection moulding to construct easy clean prism dish. Learn more about the OPTi digital handheld refractometer here.


Prod code: 38-51
Range: 0-180 (PPT) / 1.000 - 1.070 (SG)
Scale: Seawater PPT / Seawater Specific Gravity (SG)
Resolution: 1 / 0.0005


Frequently bought with OPTi

AG 40 calibration fluid - £39.99

AG Fluids are aqueous solutions that cover the range 1.33-1.40 RI (0-40 °Brix equivalent) and have a shelf life of 12-months. Add to your order for free shipping within the UK.