This invention relates to a method and apparatus for measuring the alcohol content of the breath (expired air). While measurement is in progress, by real-time visualization of the error and measure the current or accumulated, interaction type of alcohol with respect to the measurement accuracy and time lapse (interactive) control can be performed. Preferably the measurement is non-contact with a compensation for the dilution of the breath sample (without contact) performed bar, which is performed at the same time as the measurement of the temperature and the concentration of water vapor or carbon dioxide. The method of the present invention which is divided into a step-by-step procedure for the bar depends on the error and the accumulated time measured for the dilution of the breath, can affect both of these subjects who test or operation. In the measurement of the concentration limits, special advantages are achieved. Preferably, the alcohol measurement is performed by absorption spectroscopy (absorption spectroscopy) device in the infrared wavelength range. Device according to the invention the sensors (sensor) for the entity (entity) referred to above, includes an electronic unit and a display unit for the signal and data processing, and compact (compact) and a housing for a portable integrated (integration) is housed in the. In order to meet the requirements of real-time operation, the response time of the sensor should not exceed 0.5 seconds. The housing can be controlled to be opened at the time of measurement, and includes means for aiming the infrared is irradiated as measured cell (cell) and the active air flow (means) a.Alcohol, aerobic, infrared, diluted본 발명은 호기(expired air)의 알콜 농도를 측정하는 방법 및 장치에 관한 것이다. 측정이 진행되는 동안, 현재 또는 누적된 측정 값과 오류를 실시간으로 시각화함으로써, 정확도 및 시간 경과에 관하여 알콜 측정의 상호작용형(interactive) 제어가 가능해진다. 바람직하게 상기 측정은, 호흡 샘플의 희석에 대한 보상과 함께 무접촉으로(without contact) 행해지는바, 이는 기온 및 수증기 또는 이산화탄소의 농도에 대한 측정과 동시에 행해진다. 본 발명의 방법은 호기의 희석에 대한 측정 오차 및 축적 시간에 의존하는 단계별
