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Phase Doppler Particle Analyzers Systems with Powersight™ Solid-State Laser Modules


Phase Doppler Particle Analyzer (PDPA) systems from TSI now feature Powersight modules, the latest in solid-state laser technology. Our PDPA systems use patented techniques, cutting edge integrated optical design and lasers, and proven design features to give years of reliable, user-friendly, and cost effective service to the customers.

Product Details

TSI’s Phase Doppler Particle Analyzer systems provide accurate and reliable flow velocity and particle size data from all measurement situations—from simple flows to high speed, low SNR situations. With up to 800 MHz sampling rate and photon-counting level sensitivity, only TSI electronics have the speed and versatility to handle all your PDPA measurement needs. Backed by over 25 years of producing Phase Doppler and laser Doppler systems, versatility is not only a design goal; it is built-in.

The Phase Doppler Method is based upon the principles of light scattering interferometry. Measurements are made at a small, non-intrusive optical probe volume defined by the intersection of two laser beams. As a particle passes through the probe volume, it scatters light from the beams into a multi-detector receiving probe, strategically located at an off-axis collection angle. The phase shift between the Doppler burst signals from different detectors is proportional to the size of the spherical particles.


  • Spray diagnostics
  • Wind tunnels
  • Turbulence measurements
  • Field studies

Features and benefits

  • TSI's compact Powersight module -- using the latest in solid-state laser technology --  is configured for 1D, 2D and 3D arrangements to measure u, v and w components of the velocity and droplet size in your flow field
  • Applicable for large scale spray and dense spray, like GDI
  • Patented Intensity validation technique to ensure accurate sizing to be measured
  • Easy-to-use Flowsizer™ Data Acquisition and Analysis Software included- Microsoft® Windows® 7/10 64-bit compatible
  • Easy to upgrade from 1D to 2D and 3D configurations
  • High power lasers provide high SNR for high speed and complex flows
  • Coupled with the Powersight module, fiber optic probes offer flexibility of the fiber optics arrangement, allowing measurements in hostile environments and large wind tunnels