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

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.

  • 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 Source Laser Diode: λ=660nm, 60mW
Focal Distance 150, 200, 250, 300, 350, 400 mm
Focal Point Size 0.13 mm x 1.3 mm (f=200mm)
Probe Size 61 mm (Dimension) x 345 mm (length)
Shift Frequency Model 8743-S: 0.01 to 10 MHzModel 8743: without Frequency Shifter
Signal Processor Specifications
Signal Processing System 8 bits FFT (512, 256, 128 points)
Frequency Band 1 kHz to 40 MHz (8 ranges)
Max Data Rate 60,000 speed data/sec*
Validation Burst Spectrum ratio
Interface USB 3.0
Max. number of data 100,000
Real time monitor Burst waveformBurst spectrumVelocity histogram
Analysis function Mean flow velocity, Turbulent intensity, Skewness factor, Flatness factor, Velocity histogram, Time-series display
Data output CSV format
 Supported Operating System  Windows 7/8/10(64 bit only) Japanese/English

*depending on measurement condition

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