MEASURES ON 2 SCALES – Aquarium Refractometer features specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100‰ ( 1‰=1 PPT=1000PPM), allow to get two results in different units by one test
WIDELY USE – Salinity Refractometer measures saltwater, salinity of water or seawater, ideal for aquariums, marine monitoring, fish-keeping, and saltwater pools
ATC FUNCTION – Saltwater refractometer with automatic temperature compensation (ATC) function, allow you to obtain the accurate result faster and easier