Rotor Weigher

Introducing the world’s most convenient


for weighing of flour, powders & bran

The 10 Point

  • Proven Technology
  • Economical Solution
  • Reliable & Robust
  • Maintenance-Free
  • Made in Germany
  • ATEX Compliant
  • Insensitive to Vibrations
  • High Capacity
  • Versatile Installations
  • Food Grade Applications


  • A rotor is located in the rotor weigher which is driven by a constant speed three – phase induction motor.
  • The product to be weighed is fed to the centre of the rotor and then accelerated to a peripheral speed of approximately 10 m/s.
  • As the product flows through the rotor the coriolis force, or compound centrifugal force, is created as a reaction force. This coriolis force is absorbed through a spring element below the rotor and detected by means of two magnetic flux induction sensors.
  • The coriolis force is completely proportional to the mass flow.
  • Material-specific characteristics such as, i.e., different moisture levels, flow characteristics or friction do not influence the measurement as errors.


  • Sealed dust-tight and maintenance-free system
  • Low installation height, simple assembly
  • Largely insensitive to vibrations
  • Direct mass flow measurement
  • Not dependent on friction, moisture and flow characteristics
  • Patented, proven measuring system


  • Pulse time spacing of both inductive sensors is detected accurately by the separate evaluating electronic system.
  • The momentary throughput in (kg/h) is then calculated from these times, indicated and compared with two adjustable limit values.
  • An electronic integration device then uses the output signal to calculate the total weight fed through the rotor balance system and display the result on a resetable summation device. In addition, kg pulses are available for the remote counters and yield calculators.
  • The evaluation electronic system can be installed at any distance from the weigher.
  • The system can be supplied in a wall-mounted cabinet or suitable for control panel installation.
  • A preselection counter for setting the required throughput as well as a 0 (4) – 20 A analogue output of the momentary throughput can be supplied as an option for control and registration.
Technical Specifications
Supply Voltage400 Volt, 50/60 Hz, 10A
Motor3 x 400V. 0.75kW via integrated frequency converter
Rotor RPMRC1/2 600 RPM, RC3 450 RPM
Output range Model RC 10.5 20m3/h, max.: 4 t/h
Output range Model RC 20.5 20m3/h, max.: 10 t/h
Output range Model RC 31.0 35m3/h, max.: 18 t/h
Accuracy+/- 0,5 % of the measuring range
Dimensions: Pipe DiameterRC 1/2 = 150mm, RC 3 = 200mm
Dimensions: Weigher HeightRC 1/2 = 800mm, RC 3 = 950mm
Dimensions: Weigher DiameterRC 1/2 = 500mm, RC 3 = 600mm
ColourRAL 7032
Type of ProtectionATEX Zone 22
ControlsPanel Mounting: 96 x 48 x 150 mm (W x H x D)
Wall-Box Dimensions200 X 300 x 180 mm (W xHx D)
Tye of ProtectionIP 54
Technical specifications subject to change due to continuous development