RZ120 Refractometer Beer Brix Wort Sugar Alcohol Specific Gravity Salinity Measurement Handheld Tool Specific Gravity Meter This refractometer is for measuring the Sugar Content and Special Gravity of wort. It includes an automatic temperature compensation of 10~30 degree Celsius. This refractometer can replace your hydrometer for easier and more accurate measurements. Simply use the dropper to take a sample of wort and put it on the prism. Then hold the refractometer up to the light and look through the eyepiece. Due to the dual scale there is no need convert to specific gravity as the scale measures both Brix and SG. Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry arround. We provide Manual in English, French, German, Spanish, Italian, Japanese, Russian. One Cloth bag for the convenient of customer is provided. With Built-in ATC (Automatic Temperature Compensation) from 10~30 degree Celsius. Soft Rubber eyepiece for comfortable viewing Equipped with scale measurement which provides direct reading Accurate testing results guaranteed Durable and bulit to last long Adjustable manual focusing Use ambient light only which means battery or power source is not required