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Mobile PM monitor AirQualifier EDM 264
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Mobile PM monitor AirQualifier EDM 264

AirQualifier EDM 264
Mobile PM monitor

This mobile aerosol spectrometer determines dust mass fractions and particle number size distribution. It is designed for both short and long-term continuous monitoring of dust pollution and enables real-time data analysis of particle number, dust mass and meteorological data.


Functionality: Light scattering at single particles

  • Unique measurement range in one device: TSP, PM10, PM4, PM2.5, PM1, PMcoarse and total counts, inhalable, thoracic, respirable, pm10, pm2.5 and pm1
  • 31 equidistant size channels; PSL traceable particle size distribution
  • High-class data logger; data transmission, remote access and real-time data analysis via mobile radio (LTE)
  • Long term stability and very low zero drift due to purge air for protecting laser and detector
  • Meteorological sensor for P, T, RH, wind speed & direction and precipitation
  • GPS position
  • Suitable for versatile applications
  • All in one solution, ready to use, rugged design
  • Aerodynamic aerosol focusing, total inlet flow (1.2 l/min) analyzed in the optical cell, no border zone error
  • Cost saving, low maintenance
  • Optional accessory: Interchangeable sampling probe (SVC) with switchable catalytic stripper for SVC elimination 
  • Mobile PM monitoring
  • Construction site monitoring
  • Fugitive emissions
  • Fence-line monitoring
  • Source apportionment
  • Forest fire detection
  • Technical data
Sampling probe (standard)µ-Sigma-2 inlet and heated sampling pipe
Detection principleLight scattering at single particles with diode laser
OutputTSP, PM10, PM4, PM2.5, PM1, PMcoarse and total counts Inhalable, thoracic, respirable, pm10, pm2.5 and pm1 Number concentration and size distribution GPS position, meteorological data
Particle size range0.25 … 32 μm
Size channels31 equidistant
Particle number concentration0 … 5,300,000 particles/liter
Dust mass concentration0 μg/m³ … 100 mg/m³
ReproducibilityMore than 95% at 500 nm meets ISO 21501-1
Time resolution6 s, 31 channels (selectable storage intervals: 6 s, 1 min, 5 min, 10 min, 15 min, 30 min, 1 h)
Sample volume flow rate1.2 l/min ±3% due to self regulation according to ISO 21501-1Automatic altitude correction up to 5,000 m
Internal purge air0.4 l/minProtects laser opticsReference air for self-test
Power supplyIn: 100 … 240 VAC, 47 … 63 Hz, 1.1 A/230 VAC
Power consumptionDepending on version and configuration, Pmax = 200 WEDM 264 Eco: 42 WEDM 264 Pro: 97 W
Data interfacesPro version: Data logger for mobile radio transmission (LTE); USB (type B), Ethernet (TCP-IP), Modbus, USB flash drive with GRIMM softwareEco version: USB (type B), Ethernet (TCP-IP), Modbus, USB flash drive with GRIMM software
Dimensions (H x W x D)Housing only: 44 x 45 x 21 (17.3 x 17.7 x 8.3 in)With meteo sensor and sampling probe: 73 x 51 x 23 cm (28.7 x 20.0 x 9.1 in)
WeightHousing only: 10 kg (22.0 lbs) With meteo sensor and sampling probe: 15 kg (33.1 lbs)
Operating conditions-20 … +40 °C (-4 … 104 °F)RH < 95% non condensing533 … 1133 mbar
Transport and storage-20 … +50 °C (-4 … 122 °F) RH < 95%
  • Real-time monitoring of 12 dust mass fractions simultaneously plus particle number size distribution
  • "Full flow analysis" of the entire sample volume
  • No consumables
  • Optional
264-DL: High-class data logger to upgrade Eco version for mobile radio transmission (LTE)
157L: Sensor for humidity, temperature and air pressure
158L: Sensor for humidity, temperature, air pressure, wind speed and direction
159L: Sensor for humidity, temperature, air pressure, wind speed and direction, and precipitation
270H-SVC: Interchangeable sampling probe (SVC) with switchable catalytic stripper for SVC elimination

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