EST 12 - Surface and Sizing Tester

Ultrasonic Tester for the Determination of Paper/ Board Properties via the Wetting and Absorption Behavior of Liquid

Quick tester for simple, efficient and accurate surface testing of paper and board for:

  • Surface sizing/internal sizing
  • Surface porosity
  • Coating quality / binder filming

For prediction of converting properties:

  • Printability
  • Glueability
  • Coating base paper quality


  • Easy handling
  • Automatic calculation of parameters
  • Portable
  • Partly substitution of Cobb-Tester
  • Useable with a PC

Main user:

  • Paper/ board producer
  • chemical suppliers
  • Paper/ board converter

Measuring results:

  • Intensity-time-diagram (with PC)
  • Automatic calculated values


  • In the same fashion like a "Dynamic Short-Time Cobb Tester"

Field of application:

  • Quality testing for internal- and surface-sized, coated
    respectively uncoated paper and board
  • Grammages up to 600 g/m2

Measuring result:

  • Automatically calculated quality parameters MAX and t(95)/t(99) with excellent correlation to the results of the Bristow Wheel Test and the Contact Angle Test, Hercules Sizing Test HST (no correlation to HST possible, if paper sample contains CaCO3-filter!)


  • Portable low cost unit
  • Ideal for quality control directly in production plants, for trial support by chemical application engineers and for troubleshooting

Technical data:

  • Sample dimension: 75x50mm
  • Measuring frequencies: 1MHz, 2MHz selectable
  • Dimensions: WxDxH 140x230x190mm
  • Weight: approximately 4.2 kg / 9.3 lb
  • Supply voltage: 230V, 50Hz / 115V, 60Hz
diagram1.png diagram2.png

Automatically calculated values: W, MAX, A(t), t(I)

Download this file (emtec_EST12 leaflet_en.pdf)EST 12 Leaflet[English]288 kB
Download this file (emtec_EST12 leaflet_ru.pdf)EST 12 Leaflet[ру́сский]396 kB

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