DIGITELTechnisches Bro fr DigitalelektronikElektronischer
ApparatebauMessgerte fr Umweltschutz
Since 1970 we have been developing and manufacturing Aerosol,
Gas and Wet-only Sampler
www.digitel-ag.com
DIGITEL Elektronik AGalte Gasse 18CH-8604 Hegnau
DIGITEL Elektronik GmbHSt. Martinsweg 16A-6713 Ludesch
DIGITEL PM2,5 pre-separator for 30 m/h
Determination of the PM2,5 fraction of suspended particulate
matter by means of the DIGITELDPM2,5/30/00 according to the draft
of guideline prEN14907.In order to keep the weight low, all parts
are made of aluminium or stainless steel. All aluminiumsurfaces are
treated with the long lasting proven and tested 'Ematal' which is a
highly corrosion-resistant and an extremely smooth coating (f.e.
application close to the sea). The Ematal-surfaceshaven't shown any
effects so far on the particle substances of contents to be
analysed.
General
Design
Remark
Options
In order to standardise theevaluation of the air quality
withinthe EU the standard measuringtechn iques and measur
ingprocedures have been determined.Basically for the evaluation
andcontrol of the air quality is the EUguideline 96/62/EC as well
as theEU guideline 1999/30/EC [1] whichd e t e r m i n e t h e s p
e c i f i e drequirements for the ofthe suspended matters in
theenvironment (inhalable, thoracicand alveolic fraction).
According tothis, the sampler with PM2,5 pre-separators agree with
the CEN/ISOconven t i on abou t tho rac i csuspended matters. Apart
fromabove, selective sampling ofdifferent suspended matters
invarious other applications ismandatory to be able to attribute
themeasurement results to certainsources as for example physicaland
chemical processes.
Traffic related measurements.Soot particles of elementary
carbonhave aerodynamic diameters wellin the fine dust region.
I n v e s t i g a t i o n s o f t h eanthropogenic impact onto
theaerosols found in the atmosphereare backed by size
selectivesampling
Long range transport studies,fine dust particles
(besidesfavorably shaped coarse particles)primarily are involved in
thesephenomena
Separation of undesired coarsesalt particles out of the sample
flowwhen sampling in marit imeenvironment
The DIGITEL PM2,5 Inlet is a singlestage impactor designed to
achieveits cut-off for 2,5 m at a flow rate of30 m/h. This flow has
beenselected because of the fact thatmany monitoring networks
aresampling TSP with DIGITEL HighVolume Samplers at this flow
valuesince many years. The toroidalshaped impactor plate can
beremoved for cleaning and greasing.In order to avoid icing of
theimpactor surface during winter timeheating is provided. Using a
shortpiece of the standard DIGITELsuction tube the PM2,5
canimmediately be mounted onto theentrance sleeve of the
DIGITELHigh Volume Sampler.
PM10 inlet for 30m/h flow ratePM1 inlet for 30m/h flow
ratenozzle plate to convert PM2,5inlet into PM10 inlet
evaluation
Theiranalysis requests to keep off coarsesized particles from
the sampledmaterial e.g. particles of biogenicorgin.
DIGITEL DPM 2,5/30/00 pre-separators as well as DIGITELPM2,5
systems have proved in theequivalence process that they areup to
the data-quality objectivesaccording to the draft of
guidelineprEN14907.
Specifications
sampling flow rate:dimensions:weight:material:operating
concept:
DIGITEL DPM2,5/30/00
30 m/h (500 l/min)d = 270 mm; h = 538 mmapprox. 4,5 kgaluminium,
Ematal-coatedsingle-stage impactor
DIGITELTechnisches Bro fr DigitalelektronikElektronischer
ApparatebauMessgerte fr Umweltschutz
Since 1970 we have been developing and manufacturing Aerosol,
Gas and Wet-only Sampler
Technical Data
www.digitel-ag.com
DIGITEL Elektronik AGalte Gasse 18CH-8604 Hegnau
DIGITEL Elektronik GmbHSt. Martinsweg 16A-6713 Ludesch
DIGITEL PM2,5 pre-separator for 30 m/h
b
a
c
d
ab air calm chamber 6750 cmcde
air inlet
10 nozzlesbaffle potair outlet
e
DIGITEL PM2,5 inlet opened for maintenance
More information about our latest products is available under on
our website: www.digitel-ag.comNEWS
