This is a method in which carrier gas flows into a liquid tank and vaporized liquefied gas is transported together with the carrier gas.

Bubbling method principle

Bubbling method
Bubbling method

The concentration of liquefied gas is generally calculated by dividing the vapor pressure (partial pressure) by the tank pressure (total pressure) x 100 = liquefied gas concentration (%).

The flow rate of liquefied gas can be calculated as follows: liquefied gas concentration x carrier gas flow rate.
However, it is not easy to maintain a constant vapor pressure in a liquid tank where the carrier gas keeps flowing and the liquid temperature and surface area keep changing due to continuous vaporization.

Direct vaporization and baking methods were developed for this purpose.


  • Can be used at reduced or atmospheric pressure
  • Any liquid type can be used

Bubbling method related products