1720321 Environmental Protection Agency Grimm 180 for Epa Short
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Transcript of 1720321 Environmental Protection Agency Grimm 180 for Epa Short
UK Oct 19
Optical TechnologyOptical Technology
For Dust MeasurementFor Dust Measurement
Giving YouGiving You
PM PM 1010 , PM , PM 2.52.5 & PM & PM (10 (10 -- 2.5)2.5)
SimultaneouslySimultaneously
The Light Scattering TechnologyThe Light Scattering Technology
GRIMM AerosolGRIMM Aerosol
TheTheTechnologyTechnology
Measuring Chamber
Light source Extinction = Opacity
Total Scattered light = NephelometryNot a size selective method and therefore not useful for dust mass determination
Light Scattering Methods
Reflection
Only singe particle countingpermits an individual particle size selection and consequently proper AEROSOL properties. Concentration & Size Distribution
Only a high resolution wide range multi-channel Aerosol Spectrometer can measure the concentration without dilution and give a truly REPRESENTATIVE PARTICLE SPECTRUM
Optical Detection System
GRIMM Spectrometer Optic
Pump
Laser
Sample stream with particles
Particle filterMeasuring chamber
PTFE-Filter
Light trap
Clean air
Sheath Air to protect Optics
Outlet
Purge air
Sheath air
TheTheProductsProducts
GRIMM # 180Simultaneous
Monitoringof Fine Dust in µg/m3 for
TSPPM10
PM10-2.5PM2.5PM1
19” Stationary Dust Monitor
Easy Rack Mount Installation
Nafion Dryer (Permapure)
SAMPLE PIPE EXTENSION
1.5 mExtension
for
Total length
of
3.0 m
System Integration of GRIMM 180In a Container
19” Stationary Dust Monitor
Trailer installation in Austria
Looking inside the Grimm 180
Sampling Pump
Flow = 1.2 L/minVacuum Pump
Flow = 1.8 L/min
Spectrometer
Ottawa, Env. Canada.
Evaluation Site in Canada
Williams Lake, BCEvaluation Site in Canada
Williams Lake, BC
Evaluation Site in Canada
Williams Lake, BC
MaintenanceMaintenance& Calibration& Calibration
CALIBRATION TOWER
The Grimm 180 is calibrated once a year in our Atlanta office using a calibration
tower and a reference unit for accurate particle count within ± 2% for each of the 31 size
channels
Calibration Verification
FieldFieldResultsResults
Results Ottawa, Ontario, Canada Oct-Dec 2005By Environment Canada
PM2.5 Data Grimm vs Dichot
0
5
10
15
20
25
10/15
/0510
/22/05
10/29
/0511
/05/05
11/12
/0511
/19/05
11/26
/0512
/03/05
12/10
/05
Daily Average
ug/m
3
GRIMM(ug/m3)Daily Avg
DICHOT(ug/m3)DailyAvg
GRIMM vs Dichot
y = 1.01x - 0.4729R2 = 0.9702
0
5
10
15
20
25
0 5 10 15 20 25
Grimm (ug/m3)
Dic
hot (
ug/m
3)Results Ottawa, Ontario, Canada Oct-Dec 2005
By Environment Canada
Results Lindon, UT Jan-Feb 2007 by US EPABRETT D. GROVER1, Russell W. Long1, Robert W. Vanderpool1, Robert W. Murdoch2, and Delbert J. Eatough3
1 U.S. Environmental Protection Agency, National Exposure and Research Laboratory, Durham/RTP, NC 277112 RTI International, Durham/RTP, NC 277093 Brigham Young University, Department of Chemistry and Biochemistry, Provo, UT 84602
Results Lindon, UT Jan-Feb 2007 by US EPABRETT D. GROVER1, Russell W. Long1, Robert W. Vanderpool1, Robert W. Murdoch2, and Delbert J. Eatough3
1 U.S. Environmental Protection Agency, National Exposure and Research Laboratory, Durham/RTP, NC 277112 RTI International, Durham/RTP, NC 277093 Brigham Young University, Department of Chemistry and Biochemistry, Provo, UT 84602
THANKSTHANKS