| 摘要 |
A breath alcohol-measuring device is provided, which includes a mouthpiece which can be inserted or attached, with a blow-in opening and with a blow-out opening and with a hole for breathing gas sampling in the breath alcohol-measuring device. The breath alcohol-measuring device ( 2 ) is equipped with a radiation source ( 3 ) and with a light guide ( 4 ) receiving the radiation of the radiation source ( 3 ). The light guide ( 4 ) is arranged extending from the housing of the breath alcohol-measuring device ( 2 ) up to the blow-out opening of the mouthpiece ( 1 ) such that the light guide ( 4 ) acts as an illuminating means for the mouthpiece ( 1 ).
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