Until fairly recently, it might have been sufficient to record atmospheric “dust” as an undifferentiated total value. This can be done gravimetrically by means of high- or low-volume samplers, or by so-called beta attenuation counters. Omani and international legislation and recommendations, however, now require that exact measurement of particulate matter below 10mm (PM10). With growing knowledge on the medicinal impact of fine dust, PM2.5 and PM1 are moving into the focus of attention. Furthermore, especially in a desert country, a short time resolution is essential for the measurement of (potentially hazardous) fine anthropogenic dust in a naturally “dusty” environment.
The optical Grimm Dust Monitors provide
- Continuous measurements with a high time resolution of few seconds, or customer selected average values with integration times between one minute and one day.
- Data logger with storage capacity of up to one year and/or remote control and data back-up through GSM modem.
- Information about the particle mass fractions PM10, PM2.5 and PM1.
- Declaration of the particle size distribution (for the judgment of the health relevance, and precise source identification).
- Maintenance-free and reliable measuring technology with little personnel expenses (cost efficiency).
- High sensitivity and low limits of detection (reliable determination even at low dust contamination of only a few mg/m3).
The instruments were approved for PM10 and PM2.5 according to EN12341 and EN14907, and by US-EPA.
The Grimm Environmental Dust Monitor Catalogue and a prospectus on the EDM365 Dust Monitor are available for download. For more information, visit the GRIMM site or contact METS.
On 10 May 2010, Eng. Wolfgang Brunnhuber and Mr. Obey Sedki from Grimm Aerosol held a mini-symposium on dust monitoring at METS in the Knowledge Oasis Muscat. The more general presentations are available for download:
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