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Laser Aerosol Spectrometer (LAS) 3340A

SKU: 3340A

Conduct optical measurements of particles from 90 nm to 7.5 micrometers simultaneously. The Laser Aerosol Spectrometer (LAS) 3340A combines ultra-high sensitivity and superior resolution with ease-of-use. The LAS is an optical spectrometer that measures particle size distributions from 0.09 (90 nm) to 7.5 µm. The 100 size channels are configurable; this enables users to zero in on a specific size range, or to match the resolution of another instrument.

The LAS 3340A is used in many different applications: determining the efficiency of air cleaners, HEPA/ULPA high efficiency filter testing, indoor/outdoor air quality studies, and source apportionment. Measure a complete size distribution in as little as one second.

Product Details

The Laser Aerosol Spectrometer (LAS) 3340A uses patented wide-angle optics and an intracavity laser to measure the size and number concentration of airborne particles. It features a monotonic response with respect to light scattering intensity in the Mie range for precise resolution. While the instrument is calibrated with NIST traceable Polystyrene Latex (PSL) spheres, users can easily perform custom calibrations with other aerosols.

This Laser Aerosol Spectrometer is unique in its ability to measure both sub- and supermicron particles over such a wide range, making it a true workhorse in any lab. The software runs on a Microsoft® Surface Pro® tablet with 12.3-inch touchscreen and keyboard.


Quality optical instruments are useful in a variety of applications due to their ease of use, fast measurement time, robustness, and reliability. A few common applications are listed below:

Features and benefits

  • Ultra-high Sensitivity & Superior Resolution
    • Dynamic Size Range: 0.09 to 7.5 µm
    • Typical Resolution is within 2.5 % of the particle diameter at 0.1 µm
    • 18,000 particles/cm3 at 0.01 L/min
  • Ease of Use
    • Control software running on a Microsoft® Surface Pro® tablet with 12.3-inch touchscreen and keyboard
    • Intuitive LabView™ based software
  • Flexibility
    • 100 particle size channels: user configurable. Users can zero in on a specific size range or match the resolution of a different instrument
    • User adjustable flow rate: Allows the user to optimize the flow rates for a specific application at the click of a mouse
  • State-of-the-Art Optical & Detection System
    • Patented wide angle optics and intracavity laser
    • Highly sensitive photodetectors, automated gain ration adjustment and laser reference compensation


Service, calibration, and repair options

There are two levels of service to consider based on your needs: Clean and Calibrate, and Repair, Clean and Calibrate. As every instrument model is unique, please refer to the model-specific service option cards below for details on what each package includes:

Preventative Maintenance Guide