Features Wide Application: The refractometer adaptive to most liquid sugar test, concentration meter can be used widely, suitable for most liquid sugar test, such as home brewing, agricultural, horticultural and educational purposes, as well as sugar content, which is durable. Accuracy Refractive: The refractometer according to the different refractive indexes, the concentration measurement results are scientific and accurate.Small and accurant refractive index is manufactured through different refractive index of liquid. Convenient to Carry: The refractometer used in an easy way, compact refractometer is light in weight, small size, convenient to keep up and carry around and with good performance. Convenient to Use: Convenient for your use, refractometer supports simple and easy-to-understand operation method. Take the fruit juice sample with a dropper and put it on the prism. Then put the refractometer under the light and observe the scale through the eyepiece to more accurately measure the sugar content in melon, fruit or fruit juice. High Performance Refractometer: Via accurancy craft by many experts, the concentration measurement results are scientific and accurate, such a refractometer is entitled with high performance according to strict rule. Specification: Item Type: Refractometer Model: RHB-20ATC Sugar Test Range: 0-20% Measurement Accuracy: 0.1% Material: Aluminum Automatic Temperature Compensation (ATC): 10℃~30℃ (50℉~86℉) Package List: 1 x Refractometer 1 x Dropper 1 x Screwdriver 1 x User Manual 1 x Cloth(color random) Package List 1 x Refractometer 1 x Dropper 1 x Screwdriver 1 x User Manual 1 x Cloth(color random)