Method and apparatus for measuring the alcohol concentration...

Details Method and apparatus for measuring the alcohol concentration... Method and apparatus for measuring the alcohol concentration...

G - Physics

01

N

150/12, 73/59

G01N 33/48 (2006.01) G01N 21/00 (2006.01) G01N 33/497 (2006.01) G01N 33/98 (2006.01)

Patent

CA 1099204

ABSTRACT OF THE DISCLOSURE There is disclosed a method and apparatus for measuring the alcohol concentration in exhalation air, by continually ascertaining the alcohol concentration (S) in the exhalation air as it is being exhaled and also the flow rate (v) of the air. The alcohol concentration and whether the flow rate has been no less than a predetermined minimum rate for a predetermined period of time (t) are monitored and a determination is made as to whether the relationship Image is no greater than a predetermined threshold value (W).

273760

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