TOPINCN Portable Alcohol Refractometer, 0 80% Measuring Range Wine Spirits Tester Meter Instrument with ATC for Home Brewing Making

【TIPS FOR USE】Make sure the liquid to be tested is not corrosive before use. When using, pay attention to the cover, do not leave air bubbles on the prism to avoid data being affected. After use, wash with water, then wipe the detection prism and cover with a soft cloth. 【ALCOHOL REFRACTOMETER】A professional measuring instrument used to test non-corrosive liquid concentrations. It is widely used in scientific research, food production, alcohol retailing, etc., to easily understand any liquid. It is a very environmentally friendly and energy-saving tester that uses only ambient light and does not require a battery or power supply. 【FUNNY AND PRACTICAL】Not only can detect the concentration of various liquids, but also lead children to carry out various interesting liquid concentration testing experiments to stimulate children's interest and cultivate children's scientific thinking and hands-on ability. 【MANUAL ADJUSTMENT, VERY CONVENIENT】Adjustable focus manual focus, easy to operate and calibrate, soft rubber eyepiece provides you with a comfortable viewing experience, refracting light source provides accurate data, can directly read data without complicated calculations, and It is hand-held and can be carried around, ready to use, very convenient 【AFTER-SALES GUARANTEE】We are very concerned about the feelings of the guests. If you have any questions, please contact us in time.