Simple and easy-to-operate Smart LDV (Laser Doppler Velocimeter)

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A Laser Doppler Velocimeter (LDV) measures fluid velocity by utilizing coherence of laser light. It detects the Doppler shift frequency of the scattering light of particles in the fluid and calculates the velocity of the particles (fluid). With a LDV system, non-intrusive measurements without disturbing the measuring object, liquid or gas flow, are achieved. No calibration is necessary and reverse flow measurements at a high resolution is also possible. The LDV system provides the absolute value of the flow velocity with accuracy.

The Smart LDV III is a high quality Laser Doppler Velocimeter and compact in design. Absolute velocity measurement with high repeatability is realized with the Smart LDV III.

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  • Enhanced receiving sensitivity enabling high data-rate measurement
  • Up to 60,000 velocity data/sec.
  • High-speed data transfer by USB3.0
  • Probe designed as all-in-one, no alignment necessary
  • Aerodynamic and hydraulic property measurement
  • Measurement requiring high time-resolution
  • Comparison with CFD
  • PIV accuracy tests

Main Unit Specifications
Velocity Range-40 to 260 m/s (f = 400mm, Model 8743-S)
Laser SourceLaser Diode: λ=660nm, 60mW
Focal Distance150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm
Focal Point Size0.13 mm x 1.3 mm (f=200mm)
Probe Size61 mm (Dimension) x 345 mm (length)
Shift Frequency0.01 to 10 MHz
Signal Processor Specifications
Signal Processing System8 bits FFT (512, 256, 128 points)
Frequency Band1 kHz to 40 MHz (8 ranges)
Max Data Rate60,000 speed data/sec*
ValidationBurst Spectrum ratio
InterfaceUSB 3.0
Max. number of data100,000
Real time monitorBurst waveformBurst spectrumVelocity histogram
Analysis functionMean flow velocity, Turbulent intensity, Skewness factor, Flatness factor, Velocity histogram, Time-series display
Data outputCSV format
Supported Operating SystemWindows 7/8/10(64 bit only) Japanese/English

Data Sheet


Application Examples 1


Application Examples 2


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