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It measures the dust level in less time than the filtrated collection method. Due to its characteristics, the relative
concentration may be converted into mass concentration with the use of the coefficient of conversion into mass
concentration (K factor) calculated on the basis of the filtrated collection method.
The LD-5R PM2.5 digital dust indicator is a combination of the LD-5R with a PM2.5 cyclone particle size selector
to perform the simplified measurement of PM2.5 concentrations.