Many diagnostic procedures in medicine are not only expensive and time-consuming but often also unpleasant or painful for the patient. Much valuable information about the state of health is accessible in bodily fluids such as blood or urine. Breath, in particular, offers an endless wealth of information, as it contains the largest number of biomarkers. Axetris laser gas detection modules for specific gases can be used in the diagnosis of diseases thanks to their high selectivity. Does every inch count? Infrared sources provide a cost-optimized option in compact NDIR solutions.