1、A professional measuring insument to test salinity of food、Accurate test result, 0~28% concenation measure range, 0.2% minimum scale. 3、With automatic temperature compensation. 4、Easy to read by the clear calibration. 5、Convenient to use, handle is comfor to hold and non-slip. Description: This refractometer is a professional insument to measure salt solutions. It features high accuracy and easy operation. Widely used for food indusy to conol the salt concenations in foods and beverages. Features: A professional measuring insument to test salinity of food. Accurate test result, 0~28% concenation measure range, 0.2% minimum scale. With automatic temperature compensation. Easy to read by the clear calibration. Convenient to use, handle is comfor to hold and non-slip. Specifications: Measuring Range: 0~28% Minimum Scale: 0.2% Length: 17cm / 6.7inch Weight: approx. 233g Insuction: 1. Open the cover and carefully wipe the prism with a soft cloth. 2. Take a few drops of the solution to be measured, place on the detection prism, gently close the cover to avoid producing bubbles which will make the solution spread all over the prism surface. 3. Put the cover directly point to the light source or bright place, observe the field of view through the eyepiece. 4. Turn the eyepiece to adjust the hand wheel to make the blue and white line clear. The scale value of the iding line is the concenation of the solution. Note: 1. Please use this insument according to the insuction, be careful when using. Do not loose any connection part arbiarily, prevent violently shock, impact and falling off. 2. Use clean and soft cloth to wipe the insument, do not put into water directly to clean and avoid scratch of surface. 3. Storage the insument at dry and non-corrosive place. 4. Storage the part well. 5. The adjustment range of eyepiece and hand wheel is within 2cm left or right. Do not adjust it over 2cm, otherwise it will be broken. Package Included: 1 x Refractometer 1 x Screwdriver 1 x Pipette 1 x Clean Cloth 1 x Box