Basis weight sensor

Radiation based online measurement

Key Features

  • Non-contact, double sided online measurement
  • Rugged, proven Scienta technology with over 60 years of experience
  • Modern, intelligent sensor design using Fieldbus technology
  • More accurate online measurements using thermal stabilizing of sensors
Basis weight sensor

Measuring Method

The sensor measures the ion current caused by the beta particles ionizing the inert gas in the Ion Chamber. This current is digitalized and linearized to correlate to real g/m² of measured area weight. The beta sensor can measure weights from as low as 15 g/m² up to a maximum of 900 g/m² of various materials. This type of weight measuring sensor is very versatile and measures a range of materials very well. Other Beta sources may also be used for other weight ranges.

Benefits

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

  • Modern, intelligent sensor design
  • Built-in processor for direct GMS calculation
  • Non-contact measurement
  • Service-free construction
  • Easy and convenient to install and operate
  • Full range of scanners available
  • Easy calibration and setup
  • More accurate on-line measurements
  • Insensitive to web vibration
  • 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 Moisture and Basis Weight measurements and controls
  • Machine speeds can be increased on drying limited pulp and paper machines







Technical Specifications

Sensor Type72107211
Construction Double sidedDouble sided
Radiation sourceKr-85, 11 GBqSr-90,
1.9 GBq
Range 15 – 900 gms200 – 3000
gms
Accuracy0,25g/m ² (2 σ)2 g/m ²
(2 σ)
Repeatability0,2 g/m ² (2 σ)1 g/m ²
(2 σ)
Recommended measurement
gap
13 mm13 –
20mm
Power Requirement+24V, 1A+24V, 1A
InstallationScanning
/Fixed
Scanning
/Fixed
Sensor Type72107211
Temperature
compensation
YesYes
Interface
Options
ProfibusProfibus
ModbusModbus
EthernetEthernet
USBUSB
2x analog2x analog
Environmental
Conditions
10-60 ℃
10-95 % RH
10-60 ℃
10-95 % RH
Liquid CoolingOptionOption

References

Contact us

Mikko Kinnunen

Business director

+358207757416

Janne Kosola

Senior sales manager (Paper QCS)

+358207757406

Send us a message

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