公开(公告)号：JPH09184825A

公开(公告)日：1997-07-15

申请号：JP32969196

申请日：1996-12-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CADET GARDY ,  VALDES JORGE L

IPC: G01N29/02 ,  G01N29/00 ,  G01N29/024 ,  G01N29/22 ,  G01N29/18

Abstract: PROBLEM TO BE SOLVED: To provide a gas composition-analyzing acoustic cell which fits a vacuum system and a corrosive gas environment without acoustic coupling of a converter to a cell main body and operates in a frequency range enabling measurements of various gas mixtures. SOLUTION: A gas composition-analyzing acoustic cell 10 has a converter 80 insulated from a cell main body by a metallic housing 40. A sound-absorbing sleeve 100 surrounding a main body of the converter increases a signal-noise ratio to at least 4:1. The converter used in the acoustic cell operates in a range of kiloheltz and decreases attenuations in a gas mixture to be analyzed. The cell main body uses a vacuum seal permitting the in-line use with a vacuum device.