Abstract

2 in breathing air in which IR light from a thermal light source is guided through a measuring cell with a gas mixture to be analyzed, and the concentration of the gas to be measured that is contained in the gas mixture is determined by measuring an attenuation of the light introduced into the measuring cell caused by absorption by the gas to be measured. The thermal light source is designed as an encapsulated micro-incandescent lamp with a light-generating coil.

IPC Classes  ?

• G01N 21/3504 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• A61B 5/083 - Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01N 33/497 - Physical analysis of biological material of gaseous biological material, e.g. breath

Abstract

The invention relates to an assembly and a method for measuring a gas concentration by means of absorption spectroscopy, in particular for capnometric measurement of the amount of CO2 in breathing air, in which IR light is conducted from a thermal light source through a measurement cell having a gas mixture to be analysed, and the gas concentration of a gas to be measured that is contained in the gas mixture is determined via a measurement of a weakening of the light introduced into the measurement cell on account of absorption in the gas to be measured. According to the invention, the thermal light source is formed as an encapsulated micro incandescent lamp (20) with a light-generating coil (81).

IPC Classes  ?

• G01N 21/3504 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
• A61B 5/08 - Measuring devices for evaluating the respiratory organs
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/42 - Absorption spectrometryDouble-beam spectrometryFlicker spectrometryReflection spectrometry
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01N 33/497 - Physical analysis of biological material of gaseous biological material, e.g. breath
• A61B 5/083 - Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
• G01N 21/37 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection