Fast Aerosol Particle Emission Spectrometer (FAPES), 10 Hz Sizer and Counter0 pages

Fast Aerosol Particle Emission
Spectrometer (FAPES)
Highlights:

The reference system for fast measurements of size distributions

¸ Sampling rate up to
10 Hz
¸ Size range
6.3 - 4 74 nm
¸ Integrated hot dilution,
Neutraliser,
and 12 Vienna-type
classifiers with Faraday
Cup Electrometers
¸ Insensitive to soot
contamination
¸ Tolerates positive and
negative pressure
¸ Reliable results without
calibration
¸ Self-tests to assure
highest reliability
¸ Full size resolution
for the range in which
other fast instruments
fail (>~200 nm)

Applications:
¸ Measurements
in engine exhaust
¸ Combustion studies
¸ Monitoring of
dynamic processes
with nanoparticles
¸ Reference system for
fast particle sizers

2012

GRIMM has developed a unique system for fast measurements of particles in the size
range of 6.3 – 474 nm in a wide range of concentrations (~10 5 to 1010 particles/cm3). The
FAPES system includes:
• A well-proven Am-241 aerosol neutraliser for most accurate charging probabilities
• Twelve Differential Mobility Analysers (DMAs) of Vienna-type design, with high size
resolution and low particle losses
• Twelve fast and low noise Faraday Cup Electrometers (FCEs), each directly attached
to a DMA to minimize diffusion losses
• A fully integrated sampling and dilution system, suitable for temperatures of up to
500°C and for a pressure range of 100 – 2000 hPa
• A control system for air flows using critical nozzles for accurate flow rates at different
pressures