Breath test simulator and method

Details Breath test simulator and method Breath test simulator and method

1981-10-19

1983-10-04

Kreitman, Stephen A.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

261124, G01N 3100

Patent

active

044071523

ABSTRACT:
A breath test simulator and method for accurately calibrating breath test instruments used to determine the concentration of ethyl alcohol in breath. The simulator includes concentric chambers filled with a known concentration of ethyl alcohol-water solution. Air flowed into the first chamber is bubbled up through the solution in that chamber, sputtered through openings formed in the wall separating the chambers, bubbled up through the solution of the second chamber and is flowed thence to the breath test instrument. The air pressure and temperature of the solutions are accurately controlled to assure the effluent precisely simulates human breath leaving a precisely known alcohol vapor concentration.

REFERENCES:
patent: 3854319 (1974-12-01), Burroughs et al.
patent: 3885414 (1975-05-01), Reville
patent: 3943604 (1976-04-01), Hoppesch
patent: 4003240 (1977-01-01), Durbin
patent: 4140735 (1979-02-01), Schumacher
Bulletin No. S69, Luckey Laboratories, Inc.
Flyer for Mark IIA Alcohol Breath Simulator, Smith & Wesson.
Dubowski, Breath-Alcohol Simulators: Scientific Basis and Actual Performance, Journal of Analytical Toxicology, vol. 3, Sep./Oct. '79, pp. 177-182.

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