The invention relates to a system and method for detecting one or more gases or gas mixtures and for measuring the concentration of one or more gases or gas mixtures, {HEAD ~ said system} comprising at least a light source, a sample space, a reference chamber, and {TAIL ~ a measuring chamber} 
comprising
The invention relates to a system and method for detecting one or more gases or gas mixtures and for measuring the concentration of one or more gases or gas mixtures , { HEAD ~ said system } comprising at least a light source , a sample space , a reference chamber , and { TAIL ~ a measuring chamber }
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