G - Physics – 01 – N
Patent
G - Physics
01
N
73/132, 354/21
G01N 33/497 (2006.01) G01N 33/00 (2006.01)
Patent
CA 1137224
ABSTRACT To measure the alcohol concentration in exhaled air, the alcohol concentration S of the exhaled air and also the flow rate v of the exhaled air are continually ascertained, and the alcohol concentration S is indicated when G, wherein Image , is below a prescribed first threshold value W and when the flow rate v, after it has exceeded a prescribed second threshold value vmin and until G has fall- en below the first threshold value, has continually been greater than vmin. The apparatus for carrying out this method has a measuring apparatus and a flowmeter disposed in the flow of exhaled air reversal of flow being prevent- ed by a non-return valve, and also in indicating unit. An AND-gate triggers a linear gate with equal triggering by a first threshold value comparator and a second threshold value comparator and a first flip-flop. The linear gate serves to transmit the measured value of the measuring apparatus to the indi- cating unit.
346184
Hecker Eric
Heim Ulrich
Dragerwerk Aktiengesellschaft
Fetherstonhaugh & Co.
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