Designed to measure the salinity specific gravity of a solution of seawater and water only. Fully digital, surprisingly compact size (pocket size) allows you to easily carry it around and use it outdoors or inside factories. Features *Just 2-3 drops of sample *Easy and quick measuring *Measurement displayed in just 3 seconds *Hot or cold samples can be measured. *ATC - measurements are shown as if measured at 20°C *Zero setting (calibration) can be done with distilled or tap water! *Class IP65 - Dust-tight and Protected against water jets. Rinse clean under running water.