Tiaoyeer Salinity Refractometer with ATC Refractometer for Seawater, Pool, Tank, Testing, Marine, Fishkeeping, Dual…
ACCURATE READINGS : The Aquariums refractometer can measure on 2 Scales Aquariums refractometer features Specific Gravity (D 20/20) 1.000-1.070sg and parts per thousand 0-100PPT (1‰=1ppt=1000ppm)
ADVANCED AUTOMATIC TEMPERATURE COMPENSATION（ATC）TECHNOLOGY：Adjust Automatically to Compensate for Temperature, Which makes it even easier to get fast results.
SIMPLY USE: Using the dropper to take a sample of wort and put it on the prism. Then hold the refractometer up to the light and look scale through the eyepiece.