Refractometer

Portable, fast, accurate salinity readings
Automatically compensates for temperature
Dual scale, salinity & specific gravity
Professional results at an affordable price

This hand held Refractometer is a professional grade measuring devise to give accurate readings of salinity and specific gravity for the marine aquarium. Simple to use, this ruggedly built Refractometer includes a calibration screw to allow the user to be sure of the readings, setting the 0.0 point with Distilled Water. Add a few drops of the aquarium water to be tested and look through the eye piece toward a light source. Use the adjustable focus to read the boundary between the blue and white portions on the scale. The automatic temperature compensation is accurate for up to a 5°F change. Perfect for multiple, quick readings, the Refractometer is an indispensable testing devise for the aquarium hobbyist.