"The Hygroscopic Tandem Differential Mobility Analyser (HTDMA) measures the changes in aerosol size distribution in response to a change in relative humidity. It uses two Differential Mobility Analysers (DMAs), operated in series. The incoming air sample is dried to <10% relative humidity, and the first DMA selects a monodisperse distribution of a chosen size. The monodisperse subsample is humidified, and the second DMA, coupled to a particle counter, measures the size distribution of the humidified sample."@en . . "accepted"@en . "Manchester Centre for Atmospheric Science Hygroscopic Tandem Differential Mobility Analyser"@en . "SDN:L22::TOOL0352" . . "Manchester CAS HTDMA" . "Manchester CAS HTDMA"@en . . . . . . . . . .