Fibre Orientation Sensor

Key Features

  • Double-sided, microwave based online sensor
  • Moisture meter with built in detection of fiber orientation 0-180 degrees
  • Simultaneous detection of moisture and total fiber orientation (insensitive to sheet thickness)
  • Fast response time
Tasowheel Fibre orientation sensor

Measuring Method

The Scienta Microwave sensor model 7250SO is a double-sided, 12-channel sensor for Moisture and Fiber orientation measurement for online use. The sensor has 24 antennas in a microwave cavity forming a circle. The antennas are multiplexed and switch on/off in sequence.

The TE mode polarized microwave radiation is sensitive to the fiber orientation of the measured sheet. Each measurement of the 12 antennas will give a strength and cavity resonance peak value, which are used to calculate the overall  fiber orientation value as well as the Moisture value. As the reference frequency another TM mode resonance peak is used to make an accurate Moisture detection.


To process applications such as sack paper, cardboard products etc.

  • No radioactive source is required
  • Non-contact measurement
  • Wide measurement range
  • Service free construction; no moving parts
  • Easy and convenient to install and operate
  • Full range of scanners available
  • Easy calibration and setup
  • More accurate online measurements
  • Reduction in rejects due to high performing measurements
  • Minimization of energy consumption by accurate and reliable moisture measurements and controls
  • Optimization of paper strength properties
  • Faster on-spec quality and reduced start up waste

Technical Specifications

Sensor Type7250S0
MethodPolarized Microwave
ConstructionDouble-sided sensor
Spectral Range2100-2400 MHz
Measurement Frequency100 Hz
Measurement Resolution1 degree
Measurement Gap12 mm
Detector12 channel microwave
Sensor Type7250SO
Microwave power10mW (-7 dBm)
Frequency modeDual
Sensor power requirement+24V, 2A
Interface optionsProfibus/Modbus
-PLC ConnectionsEthernet, USB
10-60 ℃
10-95 % RH
Liquid CoolingOptional


Contact us

Mikko Kinnunen

Business director


Janne Kosola

Senior sales manager (Paper QCS)


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