1. The body adopts streamlined design, comfortable grip
2. The interior is equipped with an optical glass lens
3. The body adopts copper plating process, made of metal, the shell is silicone
4. Lens upgrade, clearer vision, clear scale
5. Internal with temperature compensation device, automatic temperature compensation range of 10-30 degrees Celsius, eliminating the need to check the temperature compensation table to correct the trouble
6. Measurement range: 0-34%
7. Grid value: 1%
8. Weight: about 130g
9. Size: about 17.3 x 4.1cm

Usage:
1. Open the cover and wipe the test prism carefully with a soft cloth
2. Take several drops of the solution to be measured, place it on the detection prism, gently close the cover to avoid air bubbles, so that the solution spreads over the prism surface
3. align the instrument into the light plate to the light source or bright, eye through the eyepiece to observe the field of view, turn the eyepiece adjustment handwheel, so that the field of view of the blue-white demarcation line is clear
4. The scale value of the demarcation line is the concentration of the solution

Caution:
1. In use must be careful and cautious, strictly in accordance with the instructions, not arbitrarily loose the connection parts of the instrument, no collision, violent vibration is strictly prohibited
2. After use, it is strictly forbidden to put it directly into water for cleaning, and it should be wiped with a clean soft cloth, and the optical surface should not be touched or scratched.
3. The instrument should be put in a dry, non-corrosive gas place for storage
4. Avoid losing spare parts
5. The instrument has been calibrated before leaving the factory, just use it directly, do not screw the eyepiece, adjust it back and forth, please adjust it in the opposite direction when it is not adjustable