SpeedFlow - Speed measurement

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SpeedFlow -
Speed measurement for solids

Speed measurement for solids

  • Usable in free fall and in pneumatics
  • Continuous speed measurement of solids (powder, granules, dust ) in metal pipes
  • Measurement directly in the conveying stream / entrained flow
  • Measurement is completely independent of material
  • Simple retrofitting using a welding socket


SpeedFlow 2.0-Pipe

Tube version with different diameters

  • Sensor is made accordingly to the existing pipe diameter
  • Can easily be integrated into the process via flared tube end
  • Measurement without product contact

For further information we are at your disposal.


The SpeedFlow was specially developed for the continuous measurement of the speed of solids such as granules, powder and dust in metal pipes.
The sensor can be used in free fall lines or in pneumatic conveyors. The measurement is completely independent of the material. The range of application can start with a material speed as low as 0.75 m/s.


The SpeedFlow uses the triboelectric effect. When solid particles fly past and impact the 2 sensor rods, this leads to a charge transfer (induced voltage). These electric signals are fed to the correlator, which precisely determines the runtime between the two rods. With the defined distance of 8 mm between the two rods, the speed can thus be determined. The commissioning takes place in the installed state. The speed is output as a 4 ... 20 mA signal.

Mounting and Installation

For the assembly of the sensor, the installation location is specified in accordance with the conveyed inlet and outlet paths. The socket is welded on at the specified installation location and then a borehole of 20 mm is drilled through the socket and through the line. The sensor is then adjusted to the wall thickness, inserted and fixed with the help of the coupling nut. The distance between sensor and analysis unit can be a maximum of 300 m.

Technical Data

Sensor Socket St 52 or stainless steel 1.4571
  Rod Tungsten Carbid (abrasion-resistant)
  Housing Stainless steel 1.4571
  Protection category IP 65 to E 60529/10.91
  Rod length 15 mm
  Velocity range 0.75 ... 35 m/s
  Temperature inside the pipe -20 ... 80 °C (higher temperatures available on request)
  Temperature outside the pipe 0 ... +60 °C
  Weight approx. 1.5 kg
  Dimensions Ø 60, Ø 20, length 320 mm (including rod length)
  Measurement accuracy ± 1% (in the calibrated measuring range)
Transmitter Power supply 24 V DC ± 10 %
  Power consumption 20 W / 24 VA
  Protection type IP 40 nach EN 60 529
  Ambient operating temperature -10 ... +45 °C
  Dimensions 23 x 90 x 118 (W x H x D)
  Weight Approx. 172 g
  DIN rail fastening DIN 60715 TH35
  Connection terminals cable cross-section 0.2 - 2.5 mm² [AWG 24-14]
  Current output 4... 20 mA (0 ... 20 mA), load < 500 Ω
  Switch output measurement alarm Relay with switchover contact - max. 250 V AC at 1 A
  Data backup Flash memory
C1-Box Dimensions 98 x 64 x 35 mm (W x H x D)

Product Information / Operating Instruction / Application Form


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