EDM 665 WRAS – OUTDOOR WIDE-RANGE AEROSOL SPECTROMETER
Aerosol spectrometer covering the particle size range from 5 nm … 32 μm. The weather-protected instrument is designed especially for atmospheric monitoring and combines two technologies: SMPS+C for nanoparticles and EDM 180 for micron-sized aerosol.
Description
Functionality: Combination of mobility particle size spectrometer and optical aerosol spectrometer.
Features:
- Particle size range from 5 nm … 32 μm
- Fully automatic 24/7 monitoring system for up to one month of unattended operation
- Energy-efficient, sampling with isothermal drying system
- Fully air-conditioned mini container
- Versatile data acquisition and communication (data logger with GSM via internet)
- Meteorological sensors for wind speed and direction, precipitation, pressure, temperature and relative humidity
Benefits:
- Mini format supersite
- Excellent counting statistics and reproducibility
- Change your research location easily
- High precision with CPC and OPC at low and high concentrations
- Low diffusion losses
- Sampling pipe available with different lengths and sampling heads
Applications:
- Atmospheric monitoring of ultrafine particles and dust
- Source identification
- Traffic emission monitoring
- Environmental and climate studies
- Studies on atmospheric nucleation
- Studies on nanoparticle growth, coagulation and transport
Technical Details:
SMPS+C:
| Measurement principle | Electrostatic classification with subsequent detection by condensational growth |
|---|---|
| Particle size range | SelectableM–DMA: 5 … 350 nmL–DMA: 10 … 1,094 nm |
| Particle size resolution | Stepping mode: 45 – 255 channelsScanning mode: 64 channels per decadeLogarithmic spacing |
| Minimum scan time | 150 s |
| Max. concentration single count mode | 150,000 particles/cm3 |
| Max. concentration photometric mode | 107 particles/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 |
| Number of size channels | 31 |
| Concentration range | 1 … 3,000,000 particles/l |
| Reproducibility | > 97% for single count mode |
| Sampling and conditioning | 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 humidityGPS positioning |
| Total inlet 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 EDM 180 | 1.2 l/min aerosol spectrometer, ±3% constant due to self-regulation |
| Operation | Data logger and netbook integrated in housing for real-time 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 | Max. 950 W (750 W only weather protection housing with air conditioning) |
| Temperature range | -20 … +55 °C (-4 … 131 °F)RH < 95% |
| Pressure range | SMPS+C: 600 … 1,100 mbar |
| Optical aerosol spectrometer | 900 … 1,100 mbarFlow 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) |
