Prism material surfaces are not affected by humidity. 2. ATC automatic temperature compensation technology: high-quality temperature compensation film. 3. Pure copper body: solid texture, gold ratio row cutting, firm structure, long service life, effectivelyimproving the durability and accuracy of the body. 4. Measuring range: 0-90% Brix (sugar content), resolution: 0.5% Brix (sugar content). Automatic temperature compensation (10~30) and calibration screw (calibration 0). Easy to handle. Place 2 or3 drops of sample on the main prism, close the plate and view the Brix value through the viewing window. 5. Wide range of application: no battery, simple operation, easy to carry, industry, household, fruit, vegetable, jam, lubricant, lotion, etc.Suitable for people who want to know the sugar content of various things for healthy management. The sugar content of vegetables and fruits can be easily measured, and even those who limit their sugar intake can safely manage their health based onthe measurement results. .Car freezing point measuring instrument - 50-0 urea freezing point meter concentration meter antifreeze freezing point detector refractometerPrecautionsThis instrument is a precision optical instrument, the following matters should be paid attention to in the use and maintenance:1. You must be careful in use, use it strictly according to the instructions, and do not arbitrarily loosen the connecting parts of the instrument, do not drop, collide, and strictly prohibit violent vibrations.2. After use, it is strictly forbidden to directly put it into water for cleaning. It should be wiped with a clean soft cloth. For the optical surface, it should not be bumped or scratched.3. The instrument should be stored in a dry, non-corrosive place.4. Avoid loss of spare parts.5. The adjustment range of the diopter adjustment handwheel 6 and eyepiece 7 is within 2 cm up and down, so the falling off of this part is caused by the operation exceeding the range of 2 cm, which is not a quality problem, but an operation errorQuantity shipped: 1 piecePackage Contents: Only the above package contents, excluding other products.Size: 158mm(Reminder: The size is measured by hand, please allow 1-2 cm measurement error)Colour: Black(Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)