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Optical Particle Sizer (OPS) 3330

SKU: 3330

Light, portable, and accurate measurement of particles 0.3 to 10 micrometers. Capable of measuring both particle concentration and particle size distribution as frequently as once per second (1 Hz), the Optical Particle Sizer (OPS) is a valuable tool in numerous applications, ranging from filter testing to industrial measurements, as well as indoor monitoring. For outdoor monitoring, sometimes the OPS is placed in TSI's weatherproof Environmental Enclosure.

The OPS uses single particle counting technology to measure particles from 0.3 to 10 µm in 16 user adjustable size channels. The measured particles can also be collected on a built-in filter for further analysis. The instrument is battery powered for up to 20 hours, and its large color touchscreen is easy to use.

Product Details

Backed by over 40 years of aerosol instrumentation design experience, the Opitical Particle Sizer (OPS) uses state-of-the-art optics with 120° light collection for better performance in the Mie range and sheath air technology for enhanced resolution and low maintenance. Rigorous NIST traceable factory calibration with our accredited electrostatic classifier and condensation particle counter ensures high measurement accuracy. The optical properties of the aerosol can be entered for most accurate size distribution data as well as improved particle mass concentration output. Each OPS is built for longevity and backed by our commitment to quality in aerosol measurement.

As a package (model 3914) with the NanoScan SMPS™ Nanoparticle Sizer 3910 spectrometer it enables users to measure three orders of size magnitude from 10 nm to 10 µm. These instruments are affordable, portable, and provide real-time data that can be merged with the multi-instrument manager (MIM) software. Used already for cabin measurements in cars and airplanes, the sky is literally the limit when it comes to new applications.


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

  • Size resolution < 5 % at 0.5 μm
  • User adjustable size channels
  • Size range: 0.3 - 10 μm in up to 16 channels
  • Wide concentration range from 0 to 3,000 particles/cm3
  • Color touch screen with intuitive user interface
  • Fully compliant with ISO 21501-1
  • Displays particle number concentration and particle mass with the ability to input refractive index and particle density
  • Filter-based sample collection for later gravimetric or chemical analysis
  • Battery-powered for up to 12 hours of operation
  • Built-in data logging capability for up to 30,000 samples
  • Includes Aerosol Instrument Manager® Software and a variety of standard accessories
  • Multi-Instrument Manager Software for use with SMPS™ system


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:

Learn more about TSI particle instruments services

Preventative Maintenance Guide