If you brew your own wine, you'll find that measuring, monitoring and controlling the concentration of grape must present is a simple task with this high quality, handheld 0-80% alcohol refractometer. Measure the concentration of alcohol in wines and water solutions Ideal for field use - the refractometer has ATC (Automatic Temperature Compensation) for precise measurement without having to re-calibrate after changes in ambient working temperature. Benefits: Adjustable manual focusing Rubberized grip handle Soft rubber eye piece for comfortable viewing Calibration screw ATC - Automatic Temperature Compensation The alcohol refractometer is brand new and unused and includes: Refractometer Screwdriver for calibration Pipette for dropping samples on to the prism Instructions Specifications: Range: 0 - 80% Vol Min div: variable Accuracy: ±1%