Easy to carry: the robust design, compact size and light weight make it practical to hold. Thanks to its compact body and light weight, the device is highly portable. No batteries are required, so measurements can be taken at any time. Practical: the refractometer measures the sugar content at 0 90% (0 30 degrees) and is suitable for fruit, vegetables and beverages. The measurements can be read directly and accurately using the three scales. Easy to use: place 2 or 3 drops of sample on the main prism, close the plate and read the Brix value through the viewing window. This hand-cranked refractometer has automatic temperature compensation: 50 f ~ 86 f (10 c ~ 30 c). No need to correct previous values. Better health: Are you always worried about eating too much sugar? It not only measures the sugar content of fruits and vegetables from the garden, but also of the drinks you drink regularly How the refractometer works: water is poured into a glass and a straw is placed in it. The part of the straw that is immersed in the water seems to bend. If you add more sugar to the water, the straw in the thick sugar water will seem to bend even more. This is the principle of the refractometer: the more concentrated a liquid is, the higher its refractive index Please note the following points: Please take care when following the instructions for use. All parts used to connect the instrument are essential. The instrument is strictly prohibited from drops, knocks and strong vibrations. Do not rinse directly with water, wipe with a clean soft cloth Optical surfaces must not be knocked or scratched. The instrument must be stored in a dry and non-corrosive place. Product name: Brix 0 - 32% Refractometer Brix: 0-32% Salinity: 0-28% Automatic temperature compensation: 10 to 30C Suitable for: fruit, vegetables, beer, alcohol, juice, sugar, etc. -Product package size: 20.5*8.5*5.5cm Material: ABS Colour: black