Measuring apparatus for the determination of the particulates co

Details Measuring apparatus for the determination of the particulates co Measuring apparatus for the determination of the particulates co

1981-08-27

1983-09-27

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Solid content of gas

G01N 122

Patent

active

044061552

ABSTRACT:
The particulates content of exhaust gases is determined by a sampling device connected to the exhaust supply line. The particulates in the exhaust gases are deposited onto a gas-permeable filter material and the particulates determined by light reflected from the filter material. A constant differential exhaust gas pressure is maintained and a predetermined sample volume per time unit is metered to the filter material. The total cross-section of the exhaust-gas flow through the measuring device is maintained constant. The sampling is taken in short consecutive intervals at a rate such that the characteristics of dynamic changes in the particulates content of the exhaust gas can be determined.

REFERENCES:
patent: 3654801 (1972-04-01), Keefer et al.
patent: 3817100 (1974-06-01), Anderson et al.
patent: 4245669 (1981-01-01), Schmidt
patent: 4246788 (1981-01-01), Olin et al.

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