Patent ID: 9360417
Filing Date: 2016-06-07
CPC Classification: G01N

Claim Text:
1. A gas measurement device for measuring the concentration of a plurality of gas components by means of absorption measurement, the device comprising: a light source ( 2 ) for infrared radiation, an optics ( 22 ) for bundling the light of the light source ( 2 ), a band pass filter ( 4 ), a photoacoustic measurement cell ( 12 ) for measuring gas concentrations, and a Fabry-Perot filter ( 6 ) arranged in front of the photoacoustic measurement cell ( 12 ) in addition to the band pass filter ( 4 ) for selecting the absorption spectra, wherein the photoacoustic measurement cell ( 12 ) has a vibrating beam ( 24 ) and an interferometer ( 20 ) for measuring the deflection of the vibrating beam ( 24 ).