Infared Detectors


IR4 is a dual wavelength infrared detector, which uses the principle of infrared absorption spectroscopy to measure the concentration and composition in Polyolefins.

IR4 is the detector used in all Polymer Char analytical instruments and was designed to determine the on-line concentration and composition in HPLC, GPC or to be coupled with other separation techniques like CRYSTAF, TREF, etc., and it has been showed to be the most appropriate detector for Polyolefins.



  • Concentration and composition measurement in liquid separation techniques like GPC, TREF, CRYSTAF, HPLC, etc.
  • Excelent baseline stability.
  • Short stabilization time
  • Possibility of adding a composition sensor.
  • Easy coupling to GPC instruments, HPLC systems and other separation techniques such as TREF, CRYSTAF, etc.
  • Simple data processing.
  • Heated flow through cell incorporated.
  • No need for external utilities/gases.