Portrait Light scattering for the masses! The world's leading manufacturer of DAWN and miniDAWN multi-angle light scattering (MALS) instruments for determining the absolute molar masses and sizes of polymers and biopolymers in solution. These detectors, and Wyatt's ASTRA V GPC software, interface with any separation GPC/SEC/FFF/HPLC for characterizing molecular weights and sub-micrometer particle sizes without column calibration or reference standards.