Salinity Refractometer Handheld Seawater Hydrometers Optical Salinity Tester Portable ATC Refractometer, Dual Scale: 0-100? & 1.000-1.070 Specific Gravity, Saltwater Tester for Aquarium, Seawater,

?Handheld design and non-slip rubber handle for easy operation.
?Measure salt water or salinity of water, ideal for aquariums and marine ing.
?Built-in automatic temperature compensation(ATC) to get faster results.
?Instant Reading Result: Just need 2-3 drops of solution and a few seconds, you can get accurate readings.
?With measurement level for direct reading. Adjustable manual focus, easy to focus and calibrate.