Apparatus and method to deter circumvention of a breath...

Details Apparatus and method to deter circumvention of a breath... Apparatus and method to deter circumvention of a breath...

G - Physics

05

B

342/13, 340/140

G05B 9/02 (2006.01) G01N 33/497 (2006.01)

Patent

CA 1338112

An apparatus and method to deter circum- vention of sobriety breath tests. As a precondition to passing the test, the invention requires an operator/test subject to apply a suction at the sample delivery port (407) within a predetermined time of delivering a breath sample thereinto. The delay, if any, between the required sucking and the delivery of the breath sample is selected to be short thereby deterring a substitution of gas sources. In this way, the invention effectively deters circumvention of sobriety breath tests due to attempts to supply bogus gas samples from a positive pressure gas source incapable of applying a reverse pressure gradient.

604062

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