Solids mass flow measurement up to 20 t/h

SolidFlow 2.0

Continuous mass flow measurement of all types of dust, powder and granules in free fall and pneumatic conveying

Microwave sensor for on-line mass flow measurement of solids up to 20 t/h.
Used in pneumatic leanphase conveying or vertical freefall after mechanical feeders.

  • easy installation via weld-on socket
  • for almost all types of dusts, powders, granules
  • uses field-proven technology with active roping compensation
  • suitable for nearly all pipe diameters
Measurement for flow rates up to 20 t/h
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  • Biomass
  • Cement
  • Chemistry
  • Coal plant
  • Coating
  • Food
  • Incineration
  • Minerals
  • Wood
  • Lime plant
  • Energy
  • Gypsum
  • Power plant
  • Foundry

Application examples:

  • Simple retrofitting using a welding socket
  • ATEX-certified
  • Almost all types of dust, powder and granules can be measured
  • No installations in the material stream
  • Measuring principle: Microwave
  • Online flow metering
  • Throughput measuring flowrates up to 20 t/h
  • Active roping compensation for highest reliability
  • Wear-resistant
Technical Specifications
Material to measure Dust, powders or granulates max. grain size 20 mm
Working principle Microwave
Process pressure 1 bar, optional 10 bar
Process temperature +200°C, optional up to +900°C
Mounting Via process connection
Type of Conveying Pneumatic leanphase, vertical freefall after feeder
Flow rates Up to 20 t/h
Pipe diameter Max. 800mm
ATEX rating Category 1/2
Output 4…20mA, Modbus, Profibus


SolidFlow 2.0 is a sensor especially developed for measuring the flow rate of solids conveyed in metallic ducts.
It has successfully been tested for online-measuring of:

  • all types of dust, powder and granulates
  • grain size between 1 nm and 1 cm
  • pneumatically conveyed materials or
  • in free fall after mechanical conveying systems
  • SolidFlow is wear-resistant and the commissioning is very easy.
Sensor Technical Data
Housing Stainless steel 1.4571
Protection category IP 65, DustEx zone 20 or
GasEx zone 1 (optional)
Operating temperature Front end of sensor: -20… +80 °C
Optional: -20 … +200 °C
Sensor electronic: 0 … +60 °C
Max. working pressure 1 bar, optional 10 bar
Working frequency K-Band 24.125 GHz, ±100 MHz
Transmitting power Max. 5 mW
Weight 1.3 kg
Dimensions Ø 60, Ø 20, L 271 mm
Accuracy ± 2 … 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
DIN rail fastening
DIN 60715 TH35
Cable screw connectors
3 x M20 (4,5 – 13 mm Ø)

For the assembly of the sensor, the installation location is specified in accordance with the conveyed inlet and outlet paths.
In case of pipe diameters over 200 mm, 2 or 3 sensors per measuring point are used, with the sensors arranged at 90° or 120° to each other.
In free-fall applications (e. g. after conveyor screws or rotary conveyors), an inlet path (fall height) of at least 300 mm is ideal. Shorter inlet paths are possible by agreement.
The sensor bracket (welding socket) is welded on at the specified installation location.
After this, a 20 mm-borehole is drilled through the sensor bracket and through the pipe wall. The sensor is then adjusted to the wall thickness, inserted and fixed with the help of the coupling nut. Done!

The commissioning of the measuring device takes place via the FME analysis electronics. These electronics offer a convenient, menu-driven input of parameters such as measuring range, desired physical units or measuring signal attenuation.
The available outputs are a current output, 4…20 mA as well as a pulse output (open collector).
The menu language options are German, English or French.

SolidFlow 2.0 - Mounting and Installation

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