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) 1Adaptive to most liquid sugar test, concentration meter can be used widely, which is durable. 2Small and accurant refractive index is manufactured through different refractive index of liquid. 3Used in an easy way, compact refractometer is light in weight, convenient to keep up and carry around. 4Convenient for your use, refractometer supports simple and easy-to-understand operation method. 5Via accurancy craft by many experts, such a refractometer is entitled with high performance according to strict rule.1 x Refractometer1 x Dropper1 x Screwdriver1 x User Manual1 x Cloth(color random)