1Simple shockproof, easy to carry, clear viewing, convenient and reliable. 2Widely used in various scene industries, measure brix: 032% and specific gravity:1.0001.120. 3Accurate measurement and durability, having long service time, not easy to damage. 4Dual range refractometer measures the brix and specific gravity of your wort or wine. 5Quality silicone and plastic material manufacturing ensuring maximum durability.Condition: 100% Brand New Item Type: Beer Wort Refractometer Material: Silicone + PlasticMeasurement Range of Sugar (BRIX) : 0-32% Wort Specific Gravity: 1.000-1.120 SG Accuracy: Brix: +/- 0.20% Wort Specific Gravity: +/ -0.001 SG Directions for use: Open the cover plate and wipe the detection prism carefully with a soft cloth.Take a few drops of the solution to be measured and place them on the prism. Gently close the cover plate to avoid bubbles and make the solution spread all over the prism surface. Aim the instrument at the light source or bright place, observe the field of view through the eyepiece, turn the eyepiece to adjust the handwheel, make the blue and white dividing line of the field of view clear.The scale value of the boundary is the concentration of the solution. With automatic temperature compensation 1 x Beer Wort Refractometer 1 x Scale Straw 1 x Cleaning Cloth 1 x Manual