Product name: Handheld alcohol concentration meter 25-40% This product adopts domestic advanced production technology, and its quality and accuracy are superior to others. 1. Main technical parameters: Measuring range and minimum scale: Brix: 0-40% Minimum scale: 0.2% alcohol: 0-25% It has a temperature compensation function, which can overcome the data deviation caused by temperature changes and make the data more accurate. The eyepiece is upgraded. The lens glass is heavy crown optical glass, not ordinary glass, with higher clarity and reduced Observer fatigue. 2. Instructions for use: 1) Align the refracting prism in the direction of the light and adjust the diopter ring until the marking line is clear; 2) Adjust the reference: Before measurement, make the standard solution (pure water), the instrument and the liquid to be measured at the same temperature. Open the lid, then put 1~2 drops of standard liquid on the refracting prism, press the lid gently with your hand, and draw the dividing line between light and dark. Rotate the calibration bolt so that the light-dark dividing line in the eyepiece field of view coincides with the reference line (0%); Note: This optical instrument has been adjusted at the factory and can be used directly. 3) Open the lid, clean the prism surface with a soft flannel, put 1~2 drops of the solution to be tested on the refracting prism, cover the lid and press it gently, read the relative scale brightness of the dividing line between the prisms, which is the solution to be tested. concentration and density values. 4) After the measurement, directly wipe off the attachments on the surface of the prism and the cover with a wet flannel, and store them properly after drying. Calibration instruments need to be calibrated to zero before measurement. Take a few drops of distilled water, place it on the detection prism, turn the zero adjustment screw, and adjust the dividing line to the 0% position of the scale. The inspection prism is then cleaned and inspected. Some models of instruments require standard solutions instead of distilled water when calibrating. Precautions: This instrument is a precision optical instrument. Please pay attention to the following matters during use and maintenance: 1. You must be careful when using it, use it in strict accordance with the instructions, and do not loosen the connecting parts of the instrument at will. When using the instrument, please do not drop, collide, or violently vibrate. 2. After use, it is strictly prohibited to put it directly into water for cleaning. It should be wiped with a clean soft cloth. The optical surface must not be bumped or scratched. 3. The instrument should be stored in a dry, corrosion-free place. 4. Avoid the loss of spare parts. 3. Product Application This refractometer has the advantages of simple structure, shockproof, easy operation, easy portability, clear vision, and low price. Sugar series are used in canned food, juice manufacturing, wine fermentation, beverages, fruits, honey harvesting and other fields. Salt series are used in marine culture, aquariums, salt water preparation and other fields. The medical series is used for the detection of serum protein and urine specific gravity. Industrial series are used for testing automotive battery fluids, refrigerants, cleaning fluids, machine tool lubricants, and cutting fluids.