Model #: erx50 ERX50 The ERX50 Inline Spectrophotometer measures color across a wide range of materials, such as textured, finely patterned and glossy plastics and paper. View Upgrade Request Service Register Your Product Downloads Support Articles Do I have to measure the optical brightener (OBA) in paper Pulp measurement in the Laminated Paper Industry - ERX Series Tech Papers and Application Notes Tech Papers L10-648 Inline Application Brief