Ultra high purity gas refers to the gas whose purity is higher than 99.99%, which is prepared to meet the special needs of some scientific research and cutting-edge technology.

Some of the gas requirements are particularly pure departments, the need for ultra-pure gas purity up to 99.99%, 

Each liter of gas particles greater than 0.5 micron dust particle number should be less than three, Lentop hydrophobic PTFE membrane filter is the ideal choice in its filtration scheme.