TSI 3321 Aerodynamic Particle Sizer APS

Descriptions of TSI 3321

The Aerodynamic Particle Sizer (APS) 3321 spectrometer provides high resolution, real-time aerodynamic  easurements of particles from 0.5 to 20 µm. This unique particle sizer also measures lightscattering intensity in the equivalent optical size range of 0.37 to 20 µm. By providing paired data for each particle, the APS spectrometer opens up exciting new possibilities for those interested in studying the makeup of an aerosol.
The APS spectrometer uses a patented, doublecrest optical system for unmatched sizing accuracy.
It also includes a redesigned nozzle configuration and improved signal processing. The result is greater small-particle sizing efficiency, improved accuracy of mass-weighted distributions, and virtual elimination of false background counts.

• Features and Benefits
  ▪ Double-crest optics produce high-quality measurements
  ▪ Measures aerodynamic particle size from 0.5 to 20 µm
  ▪ Measures light-scattering intensity from 0.37 to 20 µm
  ▪ Real-time aerodynamic sizing
  ▪ No need to wait for cascade impactor measurements
  ▪ High size resolution – 52 size channels
  ▪ Independent of optical properties of the particles and fluid
• Applications
  ▪ Inhalation toxicology
  ▪ Drug delivery studies
  ▪ Atmospheric studies
  ▪ Ambient air monitoring
  ▪ Indoor air quality monitoring
  ▪ Filter and air cleaner testing
  ▪ Biohazard detection
  ▪ Test aerosols characterization
  ▪ Usable for particle instrument calibration
  ▪ Spray technology
  ▪ Performance evaluations of aerodynamic devices
  ▪ Powder sizing
  ▪ Basic research

Technical specifications of TSI 3321

1. Measurement Technique
   Time-of-flight of individual particles measured in an accelerating flow field with a single, high-speed timing processor; coincidence detection achieved using a patented, double-crest optical system; particle size binning based on internally stored calibration curve
2. Particle Size Range – 0.5 to 20 µm aerodynamic sizing, 0.37 to 20 µm optical detection (PSL equivalent)
3. Aerodynamic Size Resolution – 0.02 µm at 1.0 µm, 0.03 µm at 10 µm
4. Display Resolution
   Particle Size –  32 channels per decade of particle size (logarithmic), 52 channels total;
   1,024 bins of raw time-of-flight data (4 nsec per bin) in uncorrelated mode
5. Light Scattering (log-compressed)
   16 channels of light-scattering intensity (displayed);
   64 channels of raw light-scattering data
6. Particle Type
   Airborne solids and nonvolatile liquids
7. Maximum Recommended Particle Concentration
   1,000 particles/cm3 at 0.5 µm with <5% coincidence; 1,000 particles/cm3 at 10.0 µm with <10% coincidence; usable data up to 10,000 particles/cm3
8. Minimum Particle Concentration – 0.001 particle/cm3
9. Concentration Accuracy – ±10% of reading plus variation from counting statistics
10. Maximum Processing Rate for Aerodynamic Sizing – >200,000 particles/sec
11. Sampling Time – Programmable and repeatable from 1 sec to 18 hr per sample; sampling schedules selected by user
12. Flow Rates
    Aerosol Sample  – 1.0 L/min ±0.1
    Sheath Air  – 4.0 L/min ±0.1
    Total  – 5.0 L/min ±0.2
13. Atmospheric Pressure Correction
    Automatic correction between 400 and 1,030 mbar  (full correction between 700 and 1,030 mbar)
14. Laser Source – 30-mW, 655-nm laser diode
15. Detector – Avalanche photodetector (APD)
16. Front-panel Display – 320 x 240 pixels
17. Operating Temperature – 10 to 40°C (50 to 104°F)
18. Operating Humidity – 10 to 90% R.H., non-condensing
19. Power – 100 to 240 VAC, 50/60 Hz, 100 W, single phase or 24 VDC
20. Computer Requirements – Pentium 4 processor with 2-GHz speed or better, at least 512 MB RAM
21. Operating System – Windows 7 operating system or better
22. Communications – DSUB 9-pin RS-232
23. Outputs
    Digital  – I/O 15-pin port (3 inputs, 3 outputs) for external device control and two analog inputs (0 to 10 V)
    Configurable Analog –  BNC (0 to 10 V)
    Analog Pulse  – BNC
    Digital Time-of-flight –  BNC
24. Dimensions
    Aerosol Inlet  – 3/4 in. (O.D.)
    Sensor (HWD)  – 18 cm x 30 cm x 38 cm (7 in. x 12 in. x 15 in.)
25. Weight 10 kg (22 lb.)