Device and method for measuring alcohol content in breath

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...

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Bibliographic Details
Main Authors HANS-JURGEN BUSACK, RIGOBERT CHRZAN, DIETER KRUGER, BURKHARD STOCK
Format Patent
LanguageEnglish
Published 15.01.2004
Edition7
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEDICAL OR VETERINARY SCIENCE
PHYSICS
SURGERY
TESTING
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Summary: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.
Bibliography:Application Number: AU20030204396