Salinity Refractometer (LSE) This portable refractometer features solid-aluminum construction, a rubber-gripped body and automatic temperature compensation. It has a 1 1/2" diameter and it is 7" long. It is used to measure percent (%) salinity. The refractometer has the following specifications: Resolution: 0.2% Range: 0 - 28% The refractometer was developed for the measurement of salt in sea water. The prism and lens feature a simple focus adjustment and just 2 or 3 drops of solution are enough for accurate readings.   Qty :