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In the JETSCAN, a stream (or jet) of sample is directed downwarded onto a pool of liquid at the bottom of a glass tube to generate foam. Inlet of the circulation pump is at the base of this glass tube, well below the foam. The pump forces sample liquid through a heat exchanger and back to the top of the tube to supply the jet. Experiments can be made at temperatures up to 90 °C. A video camera views foam in the glass tube, providing data to image analysis software which determines foam volume. Defoaming agent can be introduced automatically into the jet or into the reservoir holding the sample.

Schematic of JETSCAN. Operation
The schematic diagram shows key components of JetScan®
1 - Light source
2 - Video camera
3 - Cuvette to hold liquid to be foamed
4 - Glass tube
5 - Nozzle for the jet
6 - Automatic sampler to inject defoamer into the sample
7 - Circulation loop for the sample
8 - Sample or cleaning liquid entry
9 - Drain to remove sample or rinse liquid
10 - Rinse system for top of the glass tube Uses


JetScan® can be used in the many fields such as:

  • Sugar refining
  • Paper making
  • Food manufacturing
  • Detergency
  • Specialty chemicals

Measurements made by JetScan

JetScan measures in real time:

  • Volume of foam
  • Liquid flow rate required to produce a constant foam volume.
  • Quantity of liquid trapped in a foam
  • Foam "knock down" time


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