Built-in Light Source that makes it a carry-and-use-it-anywhere device, Comes with Automatic Temperature Compensation (ATC) that let itself adjust to the climate
Approved by strict quality and safety standards, undoubtedly durable, very reliable and assures accurate testing results, Comes with 3 pieces AG13 batteries, carrying case, polarizing filter, index oil, index reference list and user's manual.
Specifications:- Measuring Range : 1.30 - 1.81 RI, Minimum Graduation : (RI) 0.01 RI
Illumination : Internal Light Source with momentary/power switch , Dimension : 35mm x 63mm x 115mm, Scale Division : 0.01 nD, Weight : 0.4 kg, Ranges of Application : Laboratory, Gemology, Filter : Polarizing filter. Power Source : 3 x 1.5V AG13 button batteries. Color : Black, Accessories: One bottle of 1.800 Refractive Index Oil, Polarizing Filter, 3 pieces 1.5V AG13 Batteries, Carrying Case, Refractometer Index Reference List (For 77 common gemstones, i.e. Calcite, Jadeite, Quartz etc.), User's Manual