Chemistry: analytical and immunological testing – Oxygen containing – Hydroxyl containing
Patent
1988-08-12
1990-04-03
Richman, Barry S.
Chemistry: analytical and immunological testing
Oxygen containing
Hydroxyl containing
180272, 307 106, 340576, 422 84, 436900, G01N 3300
Patent
active
049140388
ABSTRACT:
A breath sobriety test system deters circumvention of a test having an alcohol measuring phase and an identification phase. In an alcohol measuring phase, the alcohol content of a breath sample delivered by an operator/test subject is measured in the conventional manner according to the electrical output signal of an alcohol sensor. In the identification phase, the operator/test subject confirms his or her identity as a designated individual by performing an identity-confirming act recognizable by the system. The identity-confirming act includes delivering breath to the system. The response of the alcohol sensor to the breath delivered in the identification phase is compared with the reading taken during the alcohol measuring phase. If the two readings differ by more than a predetermined amount and in particular if the identification phase reading exceeds the alcohol measurement phase reading by more than said amount, the test is not passed regardless of whether the alcohol measurement is otherwise acceptable and regardless of whether the identity-confirming act is performed correctly.
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Guardian Technologies, Inc.
McMahan Timothy M.
Richman Barry S.
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