General Scanning Mobility Particle Sizer (SMPS) 3938
The SMPS™ 3938 Scanning Mobility Particle Sizer is a cutting-edge, modular instrument designed for accurate, high-resolution measurement of submicron aerosol particle size distributions. With customizable components, rapid scan speeds (<15 seconds), and a wide measurement range from 1 nm to 1 μm, the SMPS 3938 delivers unmatched versatility and precision for nanoparticle research. Compliant with ISO 15900:2009, this system is ideal for researchers in environmental science, combustion studies, nanotechnology, and air quality monitoring. When paired with optical sizers (OPS/APS), the SMPS 3938 extends your measurement range up to 20 μm, offering a complete particle sizing solution
Features
- High resolution: Up to 128 channels/decade and 384 total size bins
- Broad size range: 1 nm to 1 µm (extendable to 10–20 µm with OPS/APS)
- Fast scanning: <15 seconds per measurement cycle
- Modular design: Mix and match 4 DMAs, 6 CPCs, 2 neutralizer types
- ISO 15900:2009 compliant
- Wide concentration range: Up to 10⁷ particles/cm³
- Discrete sizing: Based on electrical mobility, not optical properties
- Tool-free installation: With auto-recognition of components
- Stand-alone operation: Via intuitive touchscreen interface
- Data management: Includes Aerosol Instrument Manager® software
Applications
- Atmospheric studies (urban, remote, and climate research)
- Indoor air quality testing in offices, labs, and industrial settings
- Combustion emissions monitoring and engine exhaust research
- Inhalation toxicology and exposure assessment
- Nanotechnology and nanomaterial synthesis control
- Nucleation and condensation process research
- Filter testing for fine particulate matter
- Automotive and combustion research labs
- Pharmaceuticals and inhalation toxicology
- Cleanroom monitoring and semiconductor industries
Specifications
| Category | Specification |
|---|---|
| Aerosol Flow Rate | 0.2 to 5 L/min, user adjustable |
| Sheath Flow Rate | 2 to 30 L/min, user adjustable |
| Working Fluid | n-butyl alcohol (butanol), distilled water, diethylene glycol (depends on CPC) |
| Operating & Aerosol Inlet Conditions | Temperature: 10–40 °C Humidity: 0–90% RH, non-condensing Pressure: 70–125 kPa |
| DMA Voltage – Negative Standard | 308202 Dual voltage version optional; included with 3938E57, 3938EL57, 3938E89, 3938EL89 |
| Aerosol Neutralizer Options (ordered separately) | 3077: 74 MBq (2 mCi), 85Kr, 10.8-year half-life 3077A: 370 MBq (10 mCi), 85Kr, 10.8-year half-life 3088: Soft X-ray <9.5 keV, ~8,760 operating hours 6005931: Lead shielding column for 3077/3077A |
| Concentration Range | 1 to 10⁷ particles/cm³ (upper end limited by neutralizer specifications) |
| Measurement Time | <10 to 600 s selectable |
| Particle Resolution | 128 channels/decade; up to 384 total possible channels |
| Power Requirements | 3750 CPC: 200 W 3752/6/7: 335 W 3789 WCPC: 200 W 3082: 200 W |
| Dimensions (H × W × D) / Weight | 3081A: 61 × 8 × 8 cm / 5.4 kg 3085A: 21 × 10 × 10 cm / 2.2 kg 3086: 19 × 10 × 10 cm / 2 kg 3083: 47 × 13 × 13 cm / 8.5 kg 3082: 40 × 28 × 40 cm / 14.2 kg 3750: 27.5 × 18.3 × 29.9 cm / 6.6 kg 3752: 30.0 × 30.3 × 34.3 cm / 9.1 kg 3756: 30.1 × 28.1 × 35.4 cm / 9.1 kg 3757: 33.2 × 28.1 × 36.3 cm / 9.1 kg 3789: 31 × 18 × 40 cm / 8 kg |
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