Brechtel
Brechtel - Model 2100 -Scanning Electrical Mobility Spectrometer (SEMS)
FromBrechtel
The SEMS is a scanning mobility spectrometer that allows rapid aerosol number size distribution measurements. Scan times of just a few seconds are possible. It also serves as a monodisperse particle generator to calibrate other particle instruments. The SEMS is an easy-to-use and field-ready tool. With an intuitive software interface, the SEMS is easy to configure with quick data post-processing capabilities. Plotting and analysis tools allow you to plot and analyze your data during acquisition. With the broadest size range commercially available, the SEMS can satisfy more scientific needs and adapt to changing research priorities.
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- Broadest available particle size range – select up to 2 micron diameter
- Fast MCPC response and DMA scan times down to a few seconds
- Precise volumetric airflow measurements with laminar flow elements
- Easy to use software with real-time display of Number, Area and Volume distributions and timelines of all integrated properties
- Integrated sample/sheath flow drying for low RH operation
- Low maximum voltage (< 5500 volts) reduces arcing problems
- Real-time temperature, relative humidity and pressure measurements
- Broad operating pressure range allows use on aircraft – tested to 200 mb
- Fully automated, unattended operation
- Monodisperse particle selection and scanning software with on-line inversion
- Off-line inversion software for data re-processing when needed
- Configuration, calibration, and characteristic time software utilities
- Selectable particle diameter size range 0.0051.0 or 0.01 2.0 μm NOTE¹
- Size resolution (set by Qaer/Qsheath) Variable (28:1 typical)
- Scan time range 5 secs to > 1 hour
- Sheath flow range 2.5-12 lpm
- Aerosol sample flow range 0.1 to 2.0 lpm
- Particle concentration range 1-10⁸ /cm³
- Range of high voltage 0-6,000 Volts
- Pre-impactor cut size diameter 0.5 or 1.0 μm
- Communications Ethernet and RS-232
- CPC working fluid 1-Butanol
- Operating Temperature 15-35°C
- Operating Pressure 200-1,000 mb NOTE²
- Physical size 19 x 13 x 22 in/48 x 33 x 56 cm
- Weight 35 lbs/16 kg
- Power usage 80 watts (85 to 230 VAC)
- Notes:
- 1. 2 micron sizing with SEMS-DMA-UG option.
- 2. Only with SEMS-ExP options.
- Continuous monitoring of ambient size distributions
- Laboratory flow-tube studies
- Cloud condensation nucleus studies
- Visibility reduction studies
- Aerosol health impacts
- Long-term climate and air quality monitoring
- Sampling conditions with highly transient aerosol concentrations
- Vertical profiles of number distributions from aircraft