Exhaust-gas analyzing device

Details Exhaust-gas analyzing device Exhaust-gas analyzing device

1987-08-04

1989-03-21

Castel, Benoit

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

436143, G01N 700

Patent

active

048141437

ABSTRACT:
In a low-pressure testing apparatus for analyzing gas exhausted from cars under a condition in which air pressure is low, an exhaust-gas analyzing device is provided with a dilution tunnel for diluting exhaust gas from cars with air which is under a decompressed condition, the exhaust-gas analyzer is connected to said dilution tunnel at a supply port side thereof and arranged in a low-pressure testing room, and an exhaust intake is open to the air outside of the low-pressure testing room via airtight piping. An influence caused by the fluctuation of pressure within the low-pressure testing room upon the accuracy of anaylsis can be eliminated.

REFERENCES:
patent: 4040783 (1977-08-01), Collin
patent: 4061467 (1977-12-01), Becker et al.
patent: 4257439 (1981-03-01), Mayeaux
patent: 4335073 (1982-06-01), Sherwood et al.

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