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

IR4 is 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.

It consists of two modules: Spectroscopic unit and Control unit. Spectroscopic Unit hosts the flow through cell and sensors. This unit must be connected in line with the analytical system. Control unit has a microprocessor to manage the whole device and the signals acquisition.

When adding a composition or a carbonyls sensor, other useful information can be obtained in addition to the concentration. Thanks to this capability, IR4 can be used for applications in High Temperature GPC analyses like ethylene percent contents in Polypropylene copolymers, vinyl acetate in EVA, etc.

Both serial communication and also analog and digital outputs are incorporated, as well as control and acquisition software package which can be directly linked with Polymer Char’s GPC Calculations software modules.