Apparatus for detecting or measuring a constituent of a gas

Details Apparatus for detecting or measuring a constituent of a gas Apparatus for detecting or measuring a constituent of a gas

1973-09-24

1976-02-24

Reese, Robert M.

Chemistry: physical processes

Physical processes

Crystallization

23255E, G01N 2752, G01N 3316

Patent

active

039402517

ABSTRACT:
Apparatus for detecting alcohol vapour in a gas, such as exhaled breath. The apparatus comprises a detachable mouthpiece through which a person exhales. The mouthpiece includes a vent for venting some exhaled breath to atmosphere and an outlet port connected to a sensor which provides an electrical output dependent upon the amount of alcohol in the breath sample. A piston and cylinder valve assembly is provided for introducing a predetermined amount of the sample into the sensor at a time dictated by an operator. A calibrated meter, which may be analogue or digital is connected to the sensor to indicate the amount of alcohol in the sample.

REFERENCES:
patent: 3117843 (1964-01-01), Baker
patent: 3342558 (1967-09-01), Reinecke
patent: 3600134 (1971-08-01), Noller
patent: 3622278 (1971-11-01), Elzinga
patent: 3764270 (1973-10-01), Collier et al.

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