Process Control Rheometer

The Thermo Scientific HAAKE PCR 630 is the latest generation of innovative process control technology for online rheological measurements of melt index and viscosity.


The Thermo Scientific HAAKE PCR 630 (Process Control Rheometer) measures the melt index at standard ASTM loads and still maintains a minimal lag time which remains almost constant over the melt index measurement range. The slit die pressurecontrol feature allows the HAAKE PCR 630 to operate at pressures above the processpressure, thereby ensuring operation in the linear region of the trans ducers and preventing out-gassing.

This also allows to cover a wide melt index range and follow transitions with a single die, eliminating costly and trouble some die changes common to other systems.

The patented bypass design makes it possible to measure the viscosity at low shear rates without compromising residence time, this results in a much higher sensitivity when comparing different molecular weight materials. The HAAKE PCR 630 can operate in a vari ety of modes: melt index mode, transition melt index mode, purge mode, viscosity mode (stress control), and combinations of those. The rheometer can report a synthesized Mooney or Intrinsic Viscosity (IV) value – a mathematical calculation from measured shear viscosity data. For ease of operation, recipes consisting of operating parameters and control values, can be stored for various product grades.


  • Online melt index measurement
  • Online viscosity measurement


  • Polypropylene (PP)
  • Polyethylene (LDPE/HDPE/LLDPE)
  • Polyester (PET)
  • Ethylen Vinyl Acetate (EVA)
  • Polymethyl-methacrylate (PMMA)
  • Polystyrene (PS)
  • Polyamide / Nylon (PA)
  • Polycarbonate (PC)


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