A chart, printed in shades of grey matt lacquer, which when held at about 5 ft from the observer gives readings of the density values of smoke from chimneys. These are comparable with those obtained from the BS Ringelmann Chart (BS 2742C). The method of use is explained in BS 2742.Cross References:BS 2742BS 2742CVAT is applicable to this item. Discounts are available for 12 or more copies.
Original price was: $43.18.$21.00Current price is: $21.00.
Miniature smoke chart
BSI Group , 08/15/1960
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