MicroS Velocimeter

The microS™ is the first micro-optical shear stress sensor available on the market, specially designed to accurately measure velocity gradients in the laminar or turbulent sublayer of a fluid around an immersed body.

Accuracy at the heart of the boundary layer

With a probe face of Ø 9.5 mm and a total length of only 30 mm, the microS™ is designed for flush mounting on the surface of test bodies. Its ultra-small detection volume of 15 x 30 x 30 μm (centred at 75 or 135 μm from the surface) enables accurate measurements under the most demanding conditions.

The technology is based on optics that generate several linear divergent light fringes. When particles pass through these fringes, the light they scatter is processed to extract a frequency proportional to the instantaneous local velocity. From this information, the velocity gradient is calculated and, in the sublayer, converted into shear stress.

Technical characteristics:

• High-resolution shear stress measurement
• Directional sensor: measurement of gradient and flow direction
• 99% accurate results
• Maximum measured stress: up to 6500 Pa in water and 140 Pa in air
• Submersible probe, ideal for testing in hydraulic channels, wind tunnels or t environments

Composition of the microS™ system:

• microS™ probe with flat mounting
• Dedicated control electronics
• Bandpass filter for high-frequency detection
• BP-microS Burst Processor for real-time acquisition
• Data processing software package

•    Optional pre-installed computer, validated by an MSE technician

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Technical data sheets to download

MicroS Technical Data Sheet.pdf

MicroS Brochure.pdf