Nano mobility particle size spectrometer for the size range 1.1 to 55 nm

The PSMPS is a mobility particle size spectrometer that combines a Grimm SMPS+C system with the Airmodus Particle Size Magnifier (PSM). This combination allows accessing the 1 nm particle size range and offers the metrological coverage of the sub 2 nm size range that is indispensable for under-
standing the basic mechanisms of the highly dynamic processes of particle formation.

In studies on aerosol particle nucleation, the measurement of aerosol number size distributions starting from the sub 2 nm size range is crucial in order to understand the basic mechanisms of new particle formation (NPF) as well as the formation rate and growth rate of the particles (e. g. Kulmala et al., 2013, Direct Observations of Atmospheric Aerosol Nucleation. Science, 339, 934).
Particle nucleation processes are important in the atmosphere where they affect the formation of clouds and the radiative forcing but also in combustion related studies (e. g. the emissions of vehicle engines) and in material sciences (e. g. the synthesis of nanoparticles).


  • measuring number size distributions starting at 1.1 nm
  • combination of GRIMM SMPS+C with Airmodus PSM
  • Airmodus PSM allowing expansion of SMPS+C measurement range to the smallest nanoparticles and clusters
  • two-staged (DEG and n-butanol) CPC setup
  • updated GRIMM DMAs with optimized nanopartilce transmission
  • scanning, stepping and single channel mode of DMA


  • compact instrument setup
  • all in one solution
  • usable with various aerosol neutralizers
  • suitable for various nanoparticle applications:
    • studies on atmospheric nucleation
    • nanopartilce growth
    • coagulation and transport
    • fundamental aerosol research
    • many more ...
  • fully user configurable settings in our software


Airmodus Particle Size Magnifier (PSM-A10):

working fluid

Diethylene glycol
50% particle size cut-off<1.5 nm
(determined with Nickel Chromium particles)
sample flow rate (QPSM)2.5 L/min
external vacuum100 ... 350 mbar at NTP
external compressed air1.5 ... 2.5 bar at NTP
free of particles, oil, and water
power supply100 ... 240 VAC; 50 ... 60 Hz; max. 280 W
interfacesUSB or RS-232
dimensions PSM (h x w x d)

29 x 45 x 46.5 cm (11.4 x 17.7 x 18.3 in)

weight PSM

12.4 kg (27.3 lbs)

GRIMM 5417 Condensation Particle Counter:

working fluid

50% particle size cut-off4.0 nm
(determined with tungsten oxide particles)
sample flow rate (QCPC)0.3 or 0.6 L/min
sheath air flow rate (Qsh)3.0 or 10.0 L/min
internal pumpsyes
particle concentration rangesingle count mode: up to 150 000 p/cm3
photometric mode: up to 107 p/cm3
response time
t10 - t90
<3 s
power supply90 ... 264 VAC; 47 ... 63 Hz; 80 ... 130 W
interfacesUSB, RS-232, analog pulse out
dimensions 5417 (h x w x d)

40 x 25 x 29 cm (15.7 x 9.8 x 11.4 in)

weight 5417

12.4 kg (27.3 lbs)

DMAGRIMM Vienna type S-DMA or M-DMA
particle size ranges1.1 ... 55 nm @ 10 L/min Qsh
2.8 ... 155 nm @ 10 L/min Qsh

particle size resolution

Stepping  mode: 45 ... 255 channels
Scanning mode: 64 channels per decade;
logarithmic spacing

data outputparticle number size distribution (dN/dlogD)
sample humidity0 ... 95% rH, non-condensing
absolute pressure range600 ... 1050 mbar

operating temperature

15 ... 30°C (59 ... 86°F)

operating humidity

0 ... 95% rH, non-condensing


GRIMM developed a powerful software to visualize, process, and import as well as export your valuable measurement data.
This easy-to-use program is compatible to Windows XP and all later versions.

Please contact us for your for free trial version if you already own a GRIMM measurement device or more information if you are in the process of finding your measurement solution.


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