Specifications include, but are not limited to: The University is requesting a multi-angle laser light scattering (MALLS) detector system that functions with an Agilent gel permeation chromatography (GPC) or size-exclusion chromatography (SEC) system or equivalent. This includes the MALLS detector, software capable of controlling the Agilent GPC/SEC (or equivalent) in addition to the MALLS detector for the instrument, installation, warranty, and training. MALLS detector system or equivalent The MALLS detector system should meet or exceed the following specifications: The MALLS detector must make static light scattering measurements at 18 or more angular locations The MALLS detector must be able to quantify molar mass of macromolecules from at least 1000 Da to 10 MDa with excellent sensitivity and accuracy. Capable of user-installed upgrades with new firmware releases. It is preferred the MALLS instrument is equipped with a rear laser monitor that measures the intensity of the laser beam prior to entering the flow cell, in order to calculate any necessary compensation to the scattering signal for laser source intensity fluctuations and drift related to ambient temperature changes, laser device aging, dust or any other mechanism. This rear monitor ensures consistent molar mass measurements over long and short periods. It is preferred the MALLS instrument is equipped with a forward laser monitor to measure the intensity of light transmitted through the flow cell, in order to correct the scattering signal for absorbance of the laser beam by the sample as well as diagnose the presence of bubbles or large contaminants in the flow cell. It is preferred the MALLS detector can provide, or be upgradable to provide, a batch operation where a scintillation vial or cuvette can be used rather than a flow cell. This allows for use of a different solvent than what the current chromatography system uses. It is preferred the MALLS instrument is capable of interfacing to commercially available hardware and software suitable for carrying out automated composition-gradient or concentration-gradient measurements, acquiring and analyzing the data to determine molar mass, rms radius, second virial coefficient, third virial coefficient, dn/dc (differential refractive index), reaction kinetics, and the affinity and stoichiometry of macromolecular interactions.