Fisherbrand Handheld Analog Salinity Refractometer, Accuracy: +/-0.001 spc.gr; +/-1ppt, Scale Range: Specific Gravity 1.000 to 1.070spc.gr.; 0 to 100ppt, Calibration: Distilled Water, Dimensions: 204 x 39 x 39mm, For Use With: Salinity; Aqu
Fisherbrand Handheld Analog Salinity Refractometer, Accuracy: +/-0.001 spc.gr; +/-1ppt, Scale Range: Specific Gravity 1.000 to 1.070spc.gr.; 0 to 100ppt, Calibration: Distilled Water, Dimensions: 204 x 39 x 39mm, For Use With: Salinity; Aqu
Fisherbrand Handheld Analog Clinical Refractometer, Temperature Compensation: Yes, Accuracy: 0.002; 0.2 g/dl; 0.0005, Scale Range: Urine Specific Gravity 1.000 to 1.050; Serum Protein 1 to 12 g/dl; Refractive Index 1.334 to 1.360, Calibrati