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 measurements in wind tunnels or in water channels
Measurements in combustion, rotating equipment
Measurement requiring high time-resolution
PIV accuracy verification
-40 m/s to 260 m/s (f=400 mm, Model 8743-S)
Laser Diode λ= 660 nm, 60 mW
150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm
0.13 mm x 1.3 mm (f= 200 mm)
Back scatter / Forward scatter (Option)
Ø 61 mm x 345 mm
Model 8743：without frequency shifter Model 8743-S：0.01 to 10 MHz
8bit FFT (512, 256, 128 point)
1 kHz to 40 MHz (8 ranges)
60,000 speed data/sec (depending on measurement condition)