Breath monitoring apparatus

Details Breath monitoring apparatus Breath monitoring apparatus

G - Physics

01

N

G01N 27/00 (2006.01) A61B 5/097 (2006.01) G01N 7/00 (2006.01) G01N 33/497 (2006.01)

Patent

CA 2270809

An apparatus for measuring the concentration of a human breath constituent, such as alcohol, comprises a hand-held housing having an internal breath passageway with a first end through a nozzle mounted to the housing. A sensor module for detecting the constituent is mounted in the housing and provides an output signal corresponding to the presence of the constituent to be sensed. A pressure transducer is coupled to the passageway for measuring the pressure therein to allow the validity of the breath sample to be determined. A sonic signalling element is also mounted in the housing for generation of indicator sounds perceptible outside the housing to provide the user with feedback regarding the breath sample applied. Electrical coupling means in said housing couple the sensor module, pressure transducer and sonic signalling element to a remote processor.

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