Based on Wyatt Technology’s family of multi-angle light scattering detectors, the new DAWN HELEOS-II boasts 18-angles of detection for the greatest sensitivity for absolute molecular weight and size determinations of polymers and biopolymers in solution. It may be connected in series to any chromatographic system in order to determine absolute molar masses without the use of reference standards or column calibration.
The instrument incorporates a special 120mW gallium arsenide laser operating at a wavelength of 658 nm. This laser, together with its unique optical collimator, produces light-scattering signals superior to those obtained with any other light scattering instrument.
The HELEOS-II uses Wyatt Technology’s patented laser stabilization electronics and a proprietary optical system to create a beam with intensity stability and spatial mode purity that rivals the best gas lasers.
The HELEOS-II is completely new, both inside and out. A compact cabinet design features HPLC fittings on the front which permit easier connecting to industry-leading HPLC systems. The HELEOS-II may be ordered with precise sample temperature control from –30° C to 150°, or from ambient to 210° C. In addition, the HELEOS-II has a bright, 64,000 color LCD display that shows current system states, chromatographic conditions, operating status and more.
The DAWN HELEOS-II instruments join Wyatt Technology’s unique light scattering systems which include the miniDAWN TREOS, as well as the Optilab rEX—the only refractive index detector available that can be built to operate at any wavelength selected by the customer.
Contact: Geofrey Wyatt