Convenient-small size and light weight , the test can be conducted without any other laboratory equipment and skilled people: 3. Precise-all test parameters are according to international standards 4. Portable -PE plastic tube , small size , light weight; 5. Sealed by aluminum foll , long shelf life , 18 month under normal temperature.
Instructions:
1 Pull out the filament of tube's tip.
2. Evict the air in the tube
3. Insert the liquid which is detected, stop inhaling water when it is half around
4. Rock 5 to 6 times slightly, after the specified time(pls rock 1 to 2 times in the halfway).compare with the standard colorimetric card.