LDV Poster - FM

Interested in Laser Doppler Velocimetry (LDV) or Phase Doppler Particle Analysis (PDPA)? We can send you a free poster to display in your office or lab.

Request A Free LDV / PDPA Poster »

PowerSight Trade-In

New LDV System Photo

Save up to 18% when you upgrade to the latest lasers, photodetection modules, or FlowSizer modules from TSI.

Promo Details »

PowerSight Solid State Laser-based LDV System

Request A Quote Accessories Related Products

Product Details

The pre-configured one-component (1D or 2D) Laser Doppler Velocimetry (LDV) system, with new PowerSight Solid State Laser, from TSI gets you up and running in a hurry. This new and improved setup features the new PowerSight module which includes the latest in solid state lasers, transmiting and receiving optics, and all control electronics for use as a standalone solution. 

In fact all TSI's LDV Systems now combine state-of-the-art solid state laser technology and the patented and proven signal processing technique, to provide reliable, accurate measurements for your research. Additionally, the new Microsoft® Windows® 7 64-bit based FlowSizer-64 software with the system, you can easily navigate the software ready for your demanding measurements. Results come instantly to allowing you to make adjustments if needed.

Request Free Full-Size LDV Poster

Features and Benefits

  • TSI's new, compact PowerSight module- the latest in solid state laser technology- comes with this system
  • Easy-to-use FlowSizer™ Data Acquisition and Analysis Software included- Microsoft® Windows® 7 64-bit compatible
  • Flexibility
  • Power and Precision


  • Wind tunnels
  • Turbulence measurements
  • Water channels
  • Non-contact velocity measurements
  • Measurements in combustion, flames, rotating machinery
  • Field Studies

Included Items

  • PowerSight™ module (TR-SS-1D-561, TR-SS-2D, or TRSS-117-553)
  • PDM1000 Photodetector Module
  • FSA3500 Signal Processor
  • FlowSizer 64 Software Package
  • Manuals
  • Accessory kits


Resource Center

  • What is the difference between focal length and focal distance of a lense?
    Focal distance refers to the distance from the front of the lens to the beam crossing point (see figure).   To define the focal length, the lens is replaced by a line, AB. The positon of the vertical line is such that the two parallel beams are deflected, as shown in the figure, so that the two beams cross. The distance measured from this line AB to the focal point is referred to as the focal length of the lens. For the case of a thin lens (thickness of the lens/focal length is small), the value of focal length and focal distance are almost the same. For the case of a thick lens, the location of the line AB will be noticeably different from the front of the lens. Hence, the focal length and focal distance will differ.
  • What is the relationship between the velocity component measured and the frequency (Doppler) of the signal?
    The component of velocity that lies in the plane of the beams and normal to the bisector of the two laser beams of a dual-beam system is measured by an LDV system. From the following figure, the component of velocity measured is uy. If 2kappa is the angle between the two beams, the fringe spacing, df for the dual beam LDV system is:df = lambda / (2 sin kappa)where lambda is the wavelength of light.If fD is the Doppler frequency of the signal generated by the passage of a particle with velocity u (see figure) through the measuring volume:fD = uy / df Hence, the frequency of the Doppler signal is proportional to velocity.

If you are seeing this, then the pnlEUCookieScripts is working