Ash Weight sensor

Key Features

  • Double sided X-Ray based sensor using a scintillation detector
  • Noncontact sensor
  • Connection to sensor using Profibus or Modbus Fieldbus
  • More accurate online measurements with variable gamma source energy levels
ash content sensor

Measuring Method

The Scienta 7213X Online Sensor series is based on the measurement of absorption of Gamma rays in a scintillation detector. The radiation source is soft x-ray transmitter tube, which is powered by an internal power supply generating 5-10 kV. The unit is very compact and has a built-in Profibus Fieldbus connection, which can be changed into a Modbus network by changing the software settings. A USB connection is used to manage the internal linearization and filtering options.


To process applications such as paper, board, nonwovens, resin impregnation, laminating, foils etc.

  • Non-contact measurement
  • Service free construction
  • Easy and convenient to install and operate
  • Full range of scanners available
  • Easy calibration and setup
  • More accurate online measurements
  • Faster on-spec quality and reduced start up waste
  • Reduction in rejects due to high performing measurements
  • Minimization of energy consumption by accurate and reliable Ash Weight measurements and controls
  • Machine speeds can be increased on drying limited paper and board machines

Technical Specifications

Sensor Type7213X
Construction Double sided
Range 5 – 150 g/m²
(300 g/m²)
Accuracy0,25g/m ²
(2 σ)
Repeatability0,2 g/m ² (2 σ)
Recommended measurement
13 mm
Power Requirement+24V, 1A
Sensor Type7213X
Measurement Resolution0,1 g/m²
Profibus DP
Modbus RTU
2x analog
10-60 ℃
10-95 % RH
Liquid CoolingOptional


Contact us

Mikko Kinnunen

Business director


Janne Kosola

Senior sales manager (Paper QCS)


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