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Fast Response Measurement Systems

High frequency probes Up to 25 kHz

Probe Vectoflow


  • Unsteady probes combine the robustness of a pressure probe (e.g. 5-hole probe) with high temporal resolution pressure sensors. Frequencies in the range of kHz are measurable, depending on the probe geometry.


  • Geometry: Straight, L-shaped, Cobra or Drilled Elbow; Pressure sensors per customer request (>1PSIG)
  • Number of pressure holes Custom (5-hole is standard)
  • Max. length Custom
  • Min. tip diameter Standard 3-4 mm (down to 1.0 mm with Micro-Printing techniques)
  • Shaft Diameter 15 mm (standard)
  • Tip geometry Conical, hemi-spherical or custom
  • Material Stainless steel, titanium, inconel, plastics
  • Mounting method Square, hexagonal, one-sided flattened cylinder or custom
  • Reference Reference surface normal to z-axis
  • Acquisition Hardware 2x NI 9237; 1x cDAQ 9181 (Chassis); or custom
  • Acquisition & Postprocessing Software Included (Labview based)
  • Temperature range up to 100 °C (up to 210 °F) (higher with water cooling)
  • Angle range ± 60° (depending on number of holes)
  • Angle accuracy less than ± 1°
  • Velocity range 3 m/s (10 ft/s) up to Mach 1
  • Velocity accuracy less than ± 1 m/s (3 ft/s)
  • Calibration System Acoustic Calibration
  • Frequency Range up to 25 kHz (dependent on probe geometry)
  • Transfer function frequency step size Custom

More info on the Probe

Unsteady probes from Vectoflow make it possible to measure high-frequency flow phenomena in the kHz range and not just in terms of a single measured parameter. All flow parameters normally measurable with a conventional multi-hole probe can be captured, such as velocities, flow angles, total and static pressure, Mach number and density. In order to achieve this high temporal resolution, the pressure sensors are placed as close as possible to the probe head minimizing the attenuation and modulation of the pressure fluctuations in amplitude and phase. The remaining modulation of the pressure signal is corrected by calibration at Vectoflow with a specially developed frequency calibration rig. Of course, all of the advantages of the Vectoflow conventional probes are also available to the customers for the unsteady probes due to our proprietary additive manufacturing process. The geometry of the probe can be fully customized and the one-piece construction of the probe head makes it very robust.

Complete measurement system for unsteady flow phenomena
Probes with embedded pressure sensors (high frequency response)
Conventional probes with high frequency response sensors attached outside of the probe are also available
Frequency calibration of each pressure channel
Hardware for data acquisition
Software for data post-processing

Where we add value

We are measurement system architects

We aim to exceed your expectations and provide solutions which add value to your business and make you more profitable. Our approach is simple yet effective; working with you to ensure that our solutions meet your requirements, perfectly.

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UK +44 (0)1264 316470   US: +1 512 210 2288

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Or speak to our expert UK-based team now

UK +44 (0)1264 316470   US: +1 512 210 2288