The dilution of large droplets is particularly important when measuring highly concentrated droplet aerosols. Since large droplets are difficult to dilute, standard systems only work up to a size of 1 – 2 μm The newly developed dilution system LDD 100 (dilution factor 100) is the first system to dilute almost loss-free large droplets up to 10 μm
The good dilution factor of large droplets was tested with monodisperse DEHS droplets (oil) of different sizes. The results for the sizes 5 μm and 7 μm are shown in Table 1.
Chart 1: Dilution of monodisperse DEHS droplets with LDD 100
Fig. 1: Distribution of LDD 100 (7 μm)