iProbe
Instantaneous flow measurement with a multi-holeprobe has never been easier and faster.
Digital multi-hole probe, with onboard dataprocessing and direct output of engineering units: aplug & play flow measurement device
Slim design compatible with 3- and 5-holeprobe heads
Robust design with stainless steel housing
and Lemo connector
Data acquisition and power via USB

GeneralWeight probe shaft

190 g

Weight probe head

Typical head 60 g

Dimensions probeshaft

Ø20 mm x 255 mm(5-hole probe version)

Dimension probehead

Typical head 100 mm x 20mm

Probe options

3- and 5-hole probe heads

Temperature
measurement

Pt100

Figure 1: iProbe
Probe head options
The iProbe, is configurable in different multi-holeprobe configurations. This includes 2D probes suchas 3-hole probes, as well as 3D probes such as 5hole probes. The pressure distribution on the probe
tip will be correlated to individual wind tunnel
calibrations to determine static pressure, totalpressure, and the velocity components/flow angles.

Environmental Conditions
Operatingtemperature-20 ... 70 °C (-4 … 158 °F)

Operating medium

Air and other non-corrosivegases

Humidity

0 ... 95 %, non-condensing

The probe can be equipped with freely customized
probe shapes, due to the design freedom in additive
manufacturing. Shape and size can hence beadapted to any installation or access to flow pathsituation.

GeneralThe iProbe is a compact plug & play solution for flow
and pressure measurements. The setup can beused with any laptop, in field or laboratoryenvironment. Optionally, the setup can bepurchased along with VectoVis Pro, which allows
you to monitor and record engineering data in realtime.

Figure 2: Shape examples (top to bottom:
cobra probe, straight probe, L-shaped probe)
The iProbe is also available with optical tracker andcompatible with Streamwise ProCap System.
(https://www.streamwise.ch/procap/)

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Pressure Acquisition
Pressure acquisition

Pressure sensor
accuracy

up to 5 differential
pressure sensors withvariable pressure ranges
Max. +/- 0.25 % full scale(typical +/- 0.1 %)Absolute pressureacquisition

Barometric pressure
sensorSensor Options

Probe Configuration
Geometry

Straight, L-shaped, Cobra

Number of holes

3 and 5Max. probe headlength

Up to 280 mm (one part)>280 mm (multipart designs)

tip diameter

Typ. 3 mm … 5 mm

Tip geometry

Conical, spherical

Material

Stainless steel, Titanium, Inconel

Fastening

Hexagonal, one-sided flattenedcylinderReference

Reference surface normal to Z
axis

Temperature
range-20 … 70 °C

Differential pressure
range (kPa)Max. velocity(m/s) *

0.25

20.0

0.50

28.5

1.00

40.5

2.50

63.5

Sensors and Electronics

5.00

89.5

10.00

125.5

The iProbe is equipped with up to 5 differential
pressure sensors for the probe tip, and one
barometric pressure sensor which is used as areference pressure for the differential pressuresensors. All differential pressure sensors can beselected by pressure range. The temperaturecompensated pressure transducers feature highaccuracy and a minimal offset drift. The high proof
pressure provides sufficient protection against
accidental overloads.

*Standard atmosphere

Measurement Errors
Flow angles< 1°

Velocities< 1.0 m/s or < 1.0 %,whichever is greater

Temperature<1K

PC Communication
InterfacesCommunication

USB for communication
with host PC (setup anddata acquisition)Power

5 V via USBPressure reference
port

Metal tube for reference
pressure ⌀ 1,06 mm

Cable (included)

1.8m Lemo cable(FGG.0B.307)
to USB

Sampling rate

up to 50 Hz

The data can be transmitted via USB. Thetransmission rate can be set up to 50 Hz. A 5V power
supply can be provided simply via USB.
When connected via USB the pressure scanner
identifies itself to the host PC as a virtual COM port.
Thus, any software supporting serial protocols canbe used for communication.
The data acquisition can be done with VectoVis,
where e.g., a live view of all data and data recording
function in readable file formats such as .csv isavailable.

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Outputs
The following output values are available:
Outputs **NameUnit

P1…P5 (differential pressure)Pa]

Pabs (absolute pressure)Pa

Ttc (temperature of RTD)

°C

Theta (cone angle)°

Phi (roll angle)°

Alpha (angle of attack)°Beta (yaw angle)°

Vmag (velocity magnitude)m/su (x-component of velocity)m/sv (y-component of velocity)m/sw (z-component of velocity)m/s

Pd (dynamic pressure)Pa

Ps (static pressure)Paρ (air density)

kg/m3

Ttot (total temperature)°C

Ts (static temperature)°C

M (Mach number)-Alt (baro altitude)m

AltAbs (absolute altitude)mNum (counter)

-

Error

-

** Details see Manual

Contact
Vectoflow GmbH, Germany
T: +49 89 124149570
M: info@vectoflow.com
w: www.vectoflow.com
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Version: 2023-05-09