Analog Refractometer, Hand-Held, Range 1.000 to 1.050, Automatic Temperature Compensation Yes, Accuracy +/-0.0005, Resolution 0.2, Function Determines The Urine Specific Gravity, Serum Protein, or Refractive Index By Measuring The Degree of Which Light Bends As It Passes Through The Sample, Specific Gravity 1.000 to 1.050, Features All Metal Housing, Calibration Screw, Double Hinged Daylight Plate, Glass Prism, Non Roll Stand, Rubber Eye Cup, Rubber Grip, Scale Display, Length 7 1/2 in
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