Flow Measurement at low solid/air ratios


Perfectly adapted for control and regulation of reagent in flue gas treatment and transport lines with very low material concentration

Electrodynamic flow sensor for measurement of low flow rates.
For pipe diameters up to 1 m.
Ideally used in leanphase conveying.
In free fall conditions with at least 2 m/s drop speed.

  • suitable for very low concentrations
  • ceramic coating preventing sensor wear
Measurement of low flow rates
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  • Particularly good in pneumatic applications for material flow rates from a few g/h up to a few hundreds kg/h (depending on application)
  • Very reliable for free-fall applications with a drop speed of at least 2 m/s (approx. 25 cm drop height)
  • In cases where dust measuring instruments cannot cope and flow rate measuring instruments are overspecified
  • The PicoFlow is perfectly suited for industrial applications especially in power generation or cement plants where it can be used to regulate or control additional reagent in flue gas treatment: injection of activated carbon, minsorb, lignite coke…
  • Waste incineration
  • Steel
  • Chemistry
  • Energy
  • Cement
  • Pharma

Application examples:

Technical Specifications
Material to measure Dust, powders or granulates max. grain size 10 mm
Working principle Electrodynamic
Process pressure max. 10 bar
Process temperature +150°C
Mounting Via process connection
Type of Conveying Pneumatic leanphase, vertical freefall after feeder
Flow rates Depending on application
Pipe diameter Max. 1000 mm
ATEX rating Category 1/2
Output 4…20mA, Modbus, Profibus
  • Pneumatic conveying and free fall
  • Absolute measurements in g/h or kg/h
  • Materials: all types of dust, powder and granules
  • Wear-resistent
Sensor Technical Data
Housing Aluminium
Protection Type IP 66; ATEX: Cat. 1/2 GD
Operation temperature Process: -20 … +150 °C
Ambient: -20 … + 60 °C
Max. working pressure 10 bar
Weight 1,5 kg
Sensor rod Stainless steel, ceramic coated,
max. 450 mm
Accuracy ± 5 % in calibrated range
Transmitter Technical Data
Transmitter (DIN Rail) Transmitter (field housing)
Power supply 24 V DC ±10 % 110 / 230 V AC 50 Hz
(optional 24 V DC)
Power consumption 20 W / 24 VA
Protection type IP 40 to EN 60 529 IP 65 to EN 60 529/10.91
Ambient operating temperature -10 … +45 °C
Dimensions (W x H x D) 23 x 90 x 118 mm 258 x 237 x 174 mm
Weight Approx. 172 g Approx. 2.5 kg
Connection terminals cable
0.2-2.5 mm2 [AWG 24-14]
Current output 1 x 4 … 20 mA (0 … 20 mA),
load < 500 Ω
3 x 4 … 20 mA (0 … 20 mA),
load < 500 Ω
Interface RS 485 (ModBus RTU) / USB
Pulse output Open collector – max. 30 V, 20 mA
Relay contact Max. rated load:
250 V AC
Max. peak current:
6 A
Max. rated load 230 V AC:
250 VA
Max. breaking capacity DC1:
3/110/220 V: 3/0.35/0.2 A
Min. switching load:
500 mW (10 V / 5 mA)
Data backup Flash memory
The PicoFlow can be installed in metallic ducts and pipelines.

It should be installed as far as possible away from curves and other fittings such as valves and slides. The distance between the sensor rod and fittings in the duct should be at least three times the duct diameter in every flow direction.

Non-metallic ducts must be cased with a metal sleeve, a metal foil or a tight-mesh metal grille over a length of at least five times the duct diameter.
After deciding the installation location, drill a hole in the duct wall where the supplied weld-on socket can be welded perpendicular to the pipe. Then screw the sensor rod into the socket using the screw-in thread.


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