The NAR-1T is an Abbe refractometer of standard type, measures refractive indices of liquids and solids quickly and accurately. It is designed to give refractive indices of D line without using a sodium lamp. 120 VAC. Specifications: Refractive Index Range (nD): 1.3000-1.7000, Refractive Index Scale (nD): 0.001, Refractive Index Accuracy: ±0.0002, Brix Range: 0.0-95.0%, Brix Scale: 0.50%, Brix Accuracy: ±0.10%, Shipping weight: 7.5 Lbs.