The DMS500 uses a corona discharge to place a prescribed charge on each particle proportional to surface area. The charged sample is then introduced into a strong radial electrical field inside a classifier column. This field causes particles to drift through a sheath flow to the electrometer detector. Particles are detected at different distances down the column, depending upon their electrical mobility. The outputs from the 22 electrometers are then processed in real time to provide spectral data in 38 or 45 size classes and other desired parameters. The unique patented Space Charge Guard electrode prevents image charge artifacts (caused by large charged particles passing electrometers at the top of the column) without the complex software correction which would otherwise be required.
1、 Particle size range：5-1000nm
2、 Sample Flow rate：8slpm
3、 Instrument Dimensions：980h×380w×520d mm
4、 Output Data Rate：10/s-1/m
5、 Time Response：T10-90 200ms
6、 Max concentration：～1012dN/dlogDp/cc