• Heavy duty
• Equipped with scale measurement that provides direct reading
• Approved by strict quality and safety standards
• Durable and built to last long
• Heavy-duty and lightweight with its aluminum construction
• Easy to focus and calibrate
• Accurate testing results guaranteed
• Made with the highest and finest quality of aluminum & rubber that makes it lightweight
• Cushioned with soft & comfortable non-slip rubber
• Extremely easy-to-use and calibrate

METHOD OF OPERATION

1. Prepare: Aim the front end of the refractometer in the direction of a bright light, and adjust the adjusting

ring of diopter(5) until the reticle can be seen clearly.

2. Calibration: Open the cover plate(2), drop one drop of calibration solution on the prism(1), rotate and

adjust the calibration screw(3) to make the light/blue boundary coincide with reference line 1.333.

3. Measurement:Open the cover plate(2),clean the surface of prism with a piece of soft cotton flannel,

Drop 1~2 drops of the solution to be measured. Close the cover plate, and press it lightly, then read the

corresponding scale of light and dark boundary. The reading is the refractive index of the measured

solution.

4. After measurement, clean the surface of prism and cover plate with moist gauze, and it should be

stored carefully.

A refractometer is an instrument that can measure the concentration of aqueous solution

by measuring it's refractive index. All water based solution can make lightbend. The bending of light

increases at a rate proportional to the increasingsolution concentration. The hand-held refractometer is a

precise optical instrument. It is characterized

by small volume, light weight, graceful shape and easy to operate. Therefore itcan be used by all sides.

Packing list:

• 1 x Refractometer
• 1 x Pipette
• 1 x Screw driver
• 1 x Cleaning cloth
• 1 x English Instruction manu

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