Abstract: In a method for determining ethanol concentration by exhalation tests there is obtained an additional feature in indirect measuring of the temperature of the exhalation air by making an IR measurement at a wave length with a high absorption of water molecules.
Abstract: In a device for elimination of liquid condensation in a mouthpiece intended to be used in the analysis of exhalation air a tube shaped body of a heat conducting material is provided with heating means and is circumvented by a mouthpiece preferably for one time use.