RHB-20ATC Handheld 0-90% Scale Sugar Content Refraction Analyzer Fruit Sweetne Meter Soy Milk Concentration Meter With Box Features: 1. Principle: The refractometer is designed according to the principle that liquids of different concentrations have different refractive indexes It has the advantages of fast, accurate, light weight and small size. 2. How to use: Open the cover and carefully wipe the inspection mirror with a soft cloth. Take a few drops of the solution to be tested, place it on the detection prism, and gently close the cover to prevent bubbles from generating and spreading the solution on the surface of the mirror. Point the instrument's light entrance plate at the light source or bright place, observe the field of view through the eyepiece, and turn the eyepiece adjustment handwheel to make the blue and white boundary of the field of view clear. The scale value of the dividing line is the concentration of the solution. 3. Material: Made of aluminium alloy material, elegant appearance, safety standards and durable in use. Description: This product is a refraction analyzer, which has the advantages of fast, accurate, light weight and small size. Specifications: Grid value: 0.1 % Material:Aluminium alloy Refractometer size:15*4*3.8cm Cleaning cloth size:17*14cm Division:0 .5% Brix,0.5Be' (Baume),1% Water Accuracy:0.5% Brix,0.5Be' (Baume),1% Water Package Included: 1 * Brix Refractometer 1 * Pipette 1 * Mini screw driver 1 * Mini cleaning cloth 1 * Soft Protective Carrying Case 1 * Operations manual 1 * Box Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.