Scanning Mobility Particle Sizer Spectrometer 3034
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Product Details
The Scanning Mobility Particle Sizer™ (SMPS™) spectrometer Model 3034 measures aerosol particles in the range from 10 to 487 nm. It displays data using 54 size channels (32 channels per decade) for high-resolution size information.
This submicrometer particle sizer is capable of measuring concentrations in the range from 1 to 2.4 x 106 particles/cm3. Therefore, it is well-suited for applications with both low and high particle concentrations. Like our component SMPS spectrometers, the Model 3034 uses the same continuous, fast-scanning technique to avoid gaps in the particle-size-distribution data. It differs in that it has a CPC, DMA, all flow controls, and fixed operating parameters integrated in a single cabinet. This greatly simplifies instrument transport, set up, and operation.
The Scanning Mobility Particle Sizer generates a new particle size distribution every three minutes. It can operate for 30 days without a refill, it includes an auto-recovery feature in the event of a power loss, and it uses only 1 Kb of PC memory per scan! Plus, it corrects for ambient pressure and temperature automatically, so there is no need for post-acquisition data manipulation.
Features and Benefits
- Particle size measurements from 10 to 487 nm
- Continuous, fast-scanning technique eliminates gaps in the particle size distribution
- Single-box design for easy transport, set up, and operation
- Designed for long-term, continuous, unattended operation
Applications
- Continuous, environmental monitoring
- Indoor-air-quality measurements
- Inhalation research involving the health effects of ultrafine particles
- Steady-state particle emissions testing
- General laboratory work
Included Items
- Aerosol Instrument Manager® software
FAQs
Can the SMPS measure aerosols at different temperatures and pressures?
Temperature and pressure affect the mean-free-path in air which will affect the electrical mobility of the particles. Charging of the aerosol will also be effected. We have not characterized effects of pressure and temperature deviating from standard conditions.
Can the SMPS measure particles in a gaseous medium other than air?
Presently, the SMPS program only supports the gas and charging parameters for air (or nitrogen).
Do I need a 10-to-1 flow ratio between the aerosol flow and the sheath air flow?
The SMPS program allows for flow ratios other then 10 to 1. For most applications, the recommended flow ratio is 10 to 1. High flow ratios will give better size resolution but lower the particle count statistics. This may be useful when measuring the exact size of monodisperse aerosols. Lower flow ratios will improve the counting statistics, but decrease the effective size resolution. This is useful for filter testing when measuring downstream of a high-efficiency filter. Flow ratios that differ too much from 10 to 1 may cause turbulence in the DMA and degrade the sizing resolution.
Does the SMPS software collect particle concentration data on both the up and down voltage scans?
Raw particle count data from the CPC is collected on both up and down scans. All calculated particle size distributions are based only on the up-scan data. Sample data that is saved to a file from the SMPS contains raw data from the up scan (measurement scan) and the down scan. We save count data from the down scans as well as the up scan in case the customer wants to make changes in the delay time.
How is the charge distribution determined?
The SMPS program uses a table of charge probabilities named CHARGE.DAT. The table contains 162 particle size channels with charge probabilities up to 10 positive charges. The table was generated based on the work of Alfred Wiedensohler1.
How is the SMPS calibrated?
Complete SMPS systems purchased from TSI are set up and compared to standard instruments at TSI to verify correct operation. The CPC, Electrostatic Classifier, and impactor are components of the SMPS and are calibrated independently.