Blood Serum Protein: 0-12g/dl, Urine Specific Gravity: 1.000-1.050sg, Urine Refractive Index: 1.330RI-1.360RIAde Advanced Optics Clinical refractometer is specially designed for clinical usage and also intended for Veterinary. It provides veterinarians and clinicians with quick and accurate indication of vital fluid"s levels. The 3-in-1 scale design measures Urine Specific Gravity (SG), Total Serum Protein (SP) and Refractive Index (RI) in the same time. FeaturesSturdy and light weighted Aluminum bodyHigh quality and accurate testing resultATC Compensation Range (i.e. Built-in Automatic Temperature Compensation System) from 10 to 30°CEasy and very convenient to useComes with a case, calibration screwdriver, pipette and users guideMin.Divisions/Accuracy: Blood Serum Protein: 0.2g/dl Urine Specific Gravity: 0.005sg, Urine Refractive Index: 0.0005RI