Size classifier DEMC from Palas

Monodisperse size selection in the range from 4 nm to 1.4 μm

Differential Electrical Mobility Classifier DEMC 1000 / 2000

particle size range
- DEMC 1000: dp = 4 nm - 600 nm
- DEMC 2000: dp = 8 nm - 11400 nm

Special advantages:
- User can select any size within the defined size range
- DEMC can be linked to many counters to form a SMPS
- Continuous and fast scanning measuring principle
- Graphical representation of the measurement data
- Intuitive operation through 7'' touch display and GUI
- Integrated data logger
- Low maintenance
- Reliable function
- Reduces your operating costs



The DEMC size classifier selects aerosol particles according to their electrical mobility and directs them to the outlet.

In combination with a polydisperse particle source, a DEMC is used to obtain a very narrow (monodisperse) particle size distribution of nanoparticles of a certain size. Especially in calibration set-ups, accurate sizing and reliable performance of the DEMC are extremely important.  The size can be adjusted by entering the size (in nm) directly on the touch display or by using the arrow keys to increase or decrease the size.

When used as a component of an SMPS system, the DEMC provides continuous and rapid scans of the aerosol particle size distribution. Depending on user settings, a scan can be performed in just 30 seconds or in up to 64 size channels per decade.

The Palas® DEMC can be universally connected with CPCs and aerosol spectrometers of other manufacturers. Some counters are already supported and if desired we integrate your counter into the software.