Method and apparatus for measuring breath alcohol

Details Method and apparatus for measuring breath alcohol Method and apparatus for measuring breath alcohol

1981-01-26

1982-12-14

Lutter, Frank W.

Chemistry: analytical and immunological testing

Oxygen containing

Hydroxyl containing

23230M, 23232R, 422 84, 422 93, 7386483, 250343, 436130, G01N 2762, G01N 122

Patent

active

043636357

ABSTRACT:
A method and apparatus for discriminating between alcohol and acetone in a breath sample and accurately measuring the alcohol level when acetone is present in the sample. The breath sample is measured with two different types of detectors and their outputs compared. One detector uses the principles of infrared (IR) absorption, the other detector is a semiconductor, commonly called a Taguci cell, or its equivalent. Automatic correction is provided for variations in sensitivity of the semiconductor.

REFERENCES:
patent: 3830630 (1974-08-01), Kiefer et al.
patent: 4268751 (1979-04-01), Fritzlen et al.
patent: 4278636 (1981-07-01), Voigt et al.

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