Automotive Coalition for Traffic Safety, Inc.

Autoliv Development Ab

Mathias Granstam

Leif Smith

Bertil Hök

Bertil Hok

The invention relates to a system for breath test of a person. It includes a sensor unit configured to sense the presence/concentration of a volatile substance, e.g. alcohol, present in air flowing through a predefined inlet area and generating a signal corresponding to the concentration of said substance. An analyzer determines the concentration of said substance in the breath of said person. It comprises means for the temporary interruption of said air flow at a point in time coinciding with the detection of a breath. It also relates to a method comprising interrupting the flow through said predefined area for a predetermined period of time, and detecting the concentration of said substance during said interruption.

Highly accurate breath test system

A breath analyzer device () having an inlet region () and a sensor arrangement (), wherein the inlet region () is configured to receive a breath sample from a test subject and direct the sample to the sensor arrangement (), and the sensor arrangement is configured to provide a signal representative of the concentration of a volatile substance within the sample. The inlet region () includes a heater () arranged between: a sample inlet port () which is open to atmospheric air outside the device (); and a sample outlet port () which is open to the sensor arrangement (), the heater () extending at least part way along a tortuous flow channel () which extends between the inlet port () and the outlet port () for the direction of the sample to the sensor arrangement ().

Growing community of inventors

Vasteras, Sweden

Mathias Granstam