The choice for Winemakers, but beer makers can use this as well! The RHW-25/Brix-40ATC Portable Refractometer Product Specs: * 0-25% Potential Alcohol Scale (NOT Finished Alcohol! Alcohol skews ANY refractometer!) * 0-40% Brix Scale * Accuracy: +/- 0.5% Al +/- 0.20% Brix * Divisions: 0.5% Al 0.20% Brix * Sturdy design, made of Aluminum. Included are: a pipette for dropping test fluids onto the prism, a mini screwdriver for scale calibration, and a Users Guide. This Unit is better that the 0-32% Brix Models! This unit can also measure other products as well! The 0-40% Brix Range lends itself to many other uses too! This unit has an extra large Brix Scale so you fully test wine grapes, Beer Mash and more! This unit is tailored to those professionals (and home brewers) working in the Wine, Beer and Liqueur Industries. The Potential Alcohol scale gives you a "ballpark" number of what your finished alcohol will be after fermentation. Excellent unit to double benchmark for quality! FYI - NO REFRACTOMETER READS FINISHED ALCOHOL! This unit allows you to test for Sugar/Sucrose Content in items like Wine Grapes to determine the perfect time for harvest, or the perfect batch blends. The Alcohol scale allows for rapid and simple benchmarking of the original and finished product. Features ATC (Automatic Temperature Compensation) for accurate readings between 50-86"F/10-30'C. Questions? Magnum Media is your connection for Refractometer advice! Many IN STOCK in the USA! Ships out ASAP! Get it in days, not weeks! DUAL SCALE: 0-40% Brix Scale + 0-25% Potential Alcohol Scale (NOT Finished Alcohol! Alcohol skews ANY refractometer!) ACCURACY: +/- 0.5% Al +/- 0.20% Brix. *RESOLUTION : 0.5% Al 0.20% Brix The choice for Winemakers! It has Automatic Temperature Compensation or "ATC" Sturdy Aluminum Design. Included are: a pipette for dropping test fluids onto the prism, a mini screwdriver for scale calibration, and a Users Guide. This unit can also measure other products as well!The 0-40% Brix Range lends itself to many other uses too!