| 摘要 |
A device and method for measuring alcohol on the breath including a flow chamber (2) for the acquisition of the exhaled breath gas volume flow provided with a flow diaphragm (3), the flow diaphragm having a differential pressure sensor (4) measuring on both sides of the diaphragm a first measurement connection connected via a gas line (5) to the interior of the flow chamber (2) upstream of the flow diaphragm (3) and a second measurement connection connected via second and third gas lines (12,15) and a breath alcohol sensor (8) to the interior of the flow chamber (2) downstream of the flow diaphragm (3), a choke element (14) is located in the second gas line (12), the second gas line (12) being connected to a sample acquisition system (9,10), an input side of an evaluation and control unit (6) connected to the sensors (4,8) and receives the measurement signals from said sensors the output side of an evaluation and control (6) being connected to the sample acquisitions system (9,10) in order to control it. The device allows for functional faults to be identified and more precise measurement to be made. <IMAGE> |
