RWH10/ATC is a refractometer especially designed for measuring saltwater density and/or salinity, thanks to an optical device which makes the most of the relation between density and index of refraction of a fluid.
It is provided with two scales related to density (SG) and salinity (PTT).
The calibration of RWH10/ATC refractometer can be easily done with distilled water.
Temperature compensation is automatic in a range of 10°-30° C.