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The Ringelmann scale is a scale for measuring the apparent density or opacity of smoke. It was developed by a French professor of agricultural engineering Maximilien Ringelmann of La Station d'Essais de Machines in Paris, who first specified the scale in 1888.
History, Applications, Technology & Standards
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smoke ringelmann scale opacity density black chart used version engineering shades grey usually air pollution boards charts kent use apparent
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Ringelmann scale | is a | scale for measuring the apparent density or opacity of smoke | 0.90 | text |
| the direction of the sun relative to the observer while the accuracy of the chart itself depends on the whiteness of the paper | instance of | and natural lighting conditions | 0.80 | text |
| blackness of the ink used.In use | instance of | and natural lighting conditions | 0.80 | text |
| the observer views the plume at the point of greatest opacity | instance of | and natural lighting conditions | 0.80 | text |
| determines the corresponding Ringelmann Number | instance of | and natural lighting conditions | 0.80 | text |
| Ringelmann scale | related to External links | Mining Publication | 0.60 | section |
| Ringelmann scale | related to External links | Ringelmann Smoke Chart | 0.60 | section |
| Ringelmann scale | related to External links | Centers | 0.60 | section |
| Ringelmann scale | related to External links | Disease Control | 0.60 | section |
| Ringelmann scale | related to External links | Prevention | 0.60 | section |
| Ringelmann scale | related to External links | CDC | 0.60 | section |
| Ringelmann scale | related to External links | Washington | 0.60 | section |
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