Red Sea Seawater Refractometer

Most of the refractometers used in aquariums are not specially designed for reef aquariums and use the brine to measure algorithm (NaCl - not sea water) at 15 ° C / 59 ° F instead of 25 ° C / 77 ° F. Thus, it is possible to deviate the measurement to 1.5 pt, which may have a significant adverse effect on the growth and color of corals.

What distinguishes Red Sea refractometer?

- directly reads the absolute salinity of sea water at 25 ° C / 77 ° F (there is no need for sea water or temperature compensation factors).

- designed specifically for measuring the content of ions in sea water (NSW) for more accurate salinity measurement (industry refractometers are calibrated for brine).

- calibrated for sea water (NSW) at 25 ° C / 77 ° F, i.e. a normal temperature range for reef aquariums (most standard refractometers are calibrated at 15 ° C / 59 ° F).

- Easier to read a higher-resolution display, focused on a respective range for reef aquariums up to 40 ppt.

- Contains integrated automatic temperature compensation (ATC) to ensure accurate measurement at a standard ambient temperature.

The PPT scale on the red water refractometer is calculated using a seawater algorithm and therefore gives the reading of the total salinity of sea water. PPT scale on regular salinity refractometers is calculated using the brine algorithm. Using brine-water refractometers will result in a salinity reading error of about 1.5 ppt.