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Description:Equipped with scale measurement which provides direct reading.Compact in size and light in weight, packed with a plastic case, convenient to store and carry around.Cushioned with soft and comfortable non-slip rubberized grip handle. Soft rubber eye piece for comfortable viewing.Automatically adjust itself to correct temperature discrepancies during use. Capable of measuring with high accuracy and provides precise results.It's super easy to use, just need 2-3 drops of solution and a few seconds, you can get accurate readings, and with the direction of the user manual, you will learn how to calibrate and use the refractometer easily.Specifications:Material: aluminum alloy, glass, rubber.Size: 19.5*4cm.Color: show as pictures.Measuring range: Salt content 0 ~ 100 ‰ (0 ~ 10%) / Salt specific gravity 1.000 ~ 1.070sg.Minimum scale: Salt content 1 ‰ (0.1%) / Salt specific gravity 0.001sg.Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package include: 1 * Salinity Refractometer.1 * Instruction manual.1 * Mini screw driver.1 * Pipette.1 * Cleaning Cloth.