DMAs: Using Different Models with the Classifier 4–5
To improve the flow field at the sample slit (in the center electrode),
the exit design for the Nano DMA is four thin supports instead of
twelve holes for the Long DMA. The lower section of the center
electrode also contains concentric cylinders. The inner cylinder
allows the sheath air to pass up to the top of the DMA while the
outer cylinder carries the monodisperse sample flow from the exit
slit to the exit port.
Figure 4-4
Schematic Diagram of the Model 3085 Nano DMA