公开(公告)号：US20240175804A1

公开(公告)日：2024-05-30

申请号：US18522602

申请日：2023-11-29

Applicant: Endress+Hauser Optical Analysis, Inc.

Inventor： Tobias Meinert ,  Benjamin Scherer ,  Marc Winter ,  Valentin Wittstock

IPC: G01N21/17 ,  G01N33/00

CPC classification number: G01N21/1702 ,  G01N33/0027 ,  G01N2021/1704

Abstract: A gas sensor for determining a concentration of at least one gas in a gas mixture includes: at least one intensity modulatable light source; a measuring section, into which the gas mixture to be investigated can be allowed to flow; and an essentially gas-sealed detection cell, wherein the gas sensor is embodied such that light emitted from the light source is radiated into a measuring section, wherein the intensity of the emitted light is modulated with a modulation frequency, which differs from the resonant frequency of a mode of the acoustic resonance of the detection cell by less than 0.5 times, especially less than 0.25 times, the half-width of the mode. Further, a method for determining the concentration of the at least one gas in the gas mixture uses the gas sensor.