Preferred Label : Ringelmann chart;
Detailed label : Ringelmann chart in atmospheric chemistry;
IUPAC definition : A chart which has been used in air pollution evaluation for assigning the degree of
blackness of smoke emanating from a source. The observer compares the shades of grey
(white to black) with a series of shade diagrams formed by horizontal and vertical
black grid lines on a white background. A corresponding number, the Ringelmann number,
is then assigned to the describe the best match; numbers range from 0 (white) to 5
(black). This method of pollution evaluation, although relevant to the enforcement
of legislation still in force in many countries, is not recommended for use today
since more quantitative indicators of the efficiency of the combustion are now available.;
Origin ID : R05394;
See also
A chart which has been used in air pollution evaluation for assigning the degree of
blackness of smoke emanating from a source. The observer compares the shades of grey
(white to black) with a series of shade diagrams formed by horizontal and vertical
black grid lines on a white background. A corresponding number, the Ringelmann number,
is then assigned to the describe the best match; numbers range from 0 (white) to 5
(black). This method of pollution evaluation, although relevant to the enforcement
of legislation still in force in many countries, is not recommended for use today
since more quantitative indicators of the efficiency of the combustion are now available.
