the invention discloses a device and method for rapid high - pressure gas sampling includes a main gas line , a sample container filled with liquid and sampling tube , a close loop sampling bypass line coupled with the said main gas line , the upper end of the sampling tube connects with a particulate filter in the sampling bypass line , the sampling tube lower end extending into inside sample container , on top of the sample container a gas outlet line is attached , condensate drain path attaches to the sample container . the fast high pressure gas sampling device significantly minimizes the process gas sampling time to a few seconds range , which will help improve a real - time gas components analysis and process control for high pressure high temperature and dust laden conditions .