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Salinity/Specific Gravity Refractometer with ATC
 Hand-Held Unit Measures Seawater and Solutions With this optical instrument, you can accurately measure the density of seawater and other water-based solutions. The rubber hand grip blocks heat and it offers automatic temperature compensation. Specifications: Metal body has a cushioned eyepiece. Refractometer features a calibration screen and has a prism that's mounted in high-impact plastic. Measures 1.57" dia. x 6.18"L. Includes a plastic pipet, carrying case and a calibration screwdriver.
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