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Extech RF20 Portable Salinity Refractometer, Case Included, 0-100 ppt Easy to operate - provides accurate and repeatable measurements on easy to read scale. Requires only 2 or 3 drops of solution. Simple focus adjustment on prism and lens. Includes:<ul style="margin-top:0px;padding-top: 5px; padding-bottom: 5px;"><li>Carrying case</li><li>Calibration screwdriver</li></ul>

Extech RF20 Portable Salinity Refractometer, Case Included, 0-100 ppt

rf20-portable-salinity-refractometer-case-included-0100-ppt

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