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GRIMM - Model EDM665 -Environmental Wide Range Aerosol Spectrometers
The EDM 665 Environmental Wide Range Aerosol Spectrometer combines two technologies for particle counting and classifying in one device: the Scanning Mobility Particle Sizer (SMPS+C) with the butanol condensation particle counter for nanoparticles and the approved EDM 180 for the larger fraction. Designed and specifically built for atmospheric monitoring, the EDM 665 is a unique high-tech system for accurate and highly resolved measurements over the entire particle size range from 5 nm to 32 μm in 71 particle size channels. The system requires low maintenance, and can be transported and deployed in the field for short and long-term atmospheric monitoring projects. This configuration places the EDM 665 in the leading position of the atmospheric particle monitoring systems.
- atmospheric monitoring of ultrafine particles and dust
- source identification
- atmospheric science
- traffic emission monitoring
- measurement principle : electrostatic classification with subsequent detection by condensational growth
- particle size range :
- selectable
- M - DMA 5 – 350 nm
- L - DMA 10 - 1094 nm
- minimum scan time : 150 s
- max. concentration single count mode : 150 000 p/cm3
- max. concentration photometric mode : 107 p/cm3
- reproducibility : > 95% for single count mode
- > 90% for photometric mode
- working fluid : n-butanol (n-butyl alcohol)
- Optical Aerosol Spectrometer
- measurement principle : light scattering at single particles;
- detection volume aerodynamically focused, no border zone error
- particle size range : 0.25 μm - 32 μm
- concentration range : 1 – 3 000 000 p/L
- reproducibility : > 97% for single particle count mode
- ampling and conditioning : 1 m sampling pipe with sampling head, isothermal humidity extraction via Nafion membrane, sensorcontrolled, without loss of semi-volatile compounds (SVC)
- weather housing : stainless steel, powder-coated, air-conditioned
- climate sensors : wind speed and direction, precipitation, pressure, temperature
- relative humidity; GPS positioning
- total flow rate : 1.5 L/min, ≤ 5% difference to the nominal flow rate
- sample air flow rate SMPS+C : 0.3 L/min CPC, flow control with critical orifice, temperature stabilized
- sample air flow rate EDM180 : 1.2 L/min aerosol spectrometer, ± 3% constant due to
- self-regulation
- operation :
- data logger and netbook integrated in housing for online data,
- meteorological sensor and GPS position
- interfaces : data logger, USB, GSM with SIM card for mobile network
- power supply : 230 VAC, 60 Hz
- power consumption 750 W
- temperature range : -20 to +55°C (-4 to 131°F), RH < 95% pressure range SMPS+C: 600 – 1100 mbar,
- optical aerosol spectrometer: 900 - 1100 mbar;
- flow rate adjustable to pressure
- dimensions (h x w x d) housing: 107 x 65 x 224 cm (42.1 x 25.6 x 88.2 in) total height with meteorological sensor: 270 cm (106.3 in)
- weight 250 kg (551 lbs)