Brookhaven Instruments’ BI-200SM Research Goniometer


Brookhaven Instruments has launched the Bl-200SM Research Goniometer System that offers access to dynamic light scattering (DLS) and static light scattering (SLS) studies with a modular, automatic and multipurpose system.

The Brookhaven Instruments Approach to Light Scattering

SLS & DLS with the BI-200SM from Brookhaven Instruments

Video credit: Brookhaven Instruments

Scientists at Brookhaven Instruments have elaborate experience in the development of methods and instruments for light scattering and this expertise has been integrated into the BI-200SM Research Goniometer to make it the perfect system available for research applications of light scattering.

With the BI-200SM Research Goniometer System from Brookhaven Instruments, this rich field of exploration presents new opportunities to study both SLS and DLS. Thus, the Bl-200SM Research Goniometer System allows users to access all these studies with a modular, automatic, and versatile system. This precision instrument has been developed to enable accurate scattering measurements.

Based on a unique turntable with a stepping motor and precision ball bearings, the contemporary design and quality construction of the Bl-200SM system ensure accurate measurements. This can be attributed to the wobble-free movement of the detector. The Bl-200SM system is field-proven in scores of laboratories and perfect for submicron particle sizing and macro-molecular analyses.

A new capability of the BI-200SM system has been developed by leveraging the numerous inputs available on the TurboCorr correlator. When an optical signal splitter is added to the scattered light beam and to a second detector, the effects of very high-speed interference can be eliminated from the detector(s). This Cross-Correlation System offers exceptionally clean data.

The modularity of the BI-200SM systems streamlines system expansion. Equipped with a regular optical rail, the BI-200SM system can be used with a polarizer, neutral density filters, a reference detector and an analyzer. Most often, unique sample requirements can be met by modifying the size or design of the cell holder.

Features at a Glance

  • Particle size and size distributions
  • Stepping motor-controlled, multi-angle measurements
  • Rg, Mw, and A2 for dilute polymer solutions
  • Avalanche photodiode detector option
  • Cross-correlation detector option
  • CONTIN, Guinier, Zimm, Fractal and more

Advantages of the BI-200SM Research Goniometer System

  • Both SLS and DLS modes—correlation and intensity measurements
  • Fine Adjustment control for angle: 0.01-degree fine adjustment to achieve over 14,000 angle increments.”
  • Large angular range—15° to 155° with 12-mm cells; 8° to 155° with 25-mm cells
  • Temperature control—heating and cooling through any regular external circulator; individual temperature and filtration plumbing are available
  • Open design/standard optical rails—eases user customizations for unique purposes
  • Alignment cell—fine-screw vertical adjustment makes it easier to locate the center of rotation
  • Special design glass vats—exclusively polished and flat entrance window guarantees minimum flare
  • Improved viewing optics—the combination of coated, precision achromats and behind-the-slit viewing and high-quality eyepiece make it easier to align
  • Numerous laser line filters—filter wheel comes with 632.8 (HeNe), 514.5/488.0 nm (Ar+), two blank (shutter) positions, and one open position for weak scatterers. It is also supplied with a 532 nm bandpass filter
  • A range of cell holders—high-precision cell holders as standard, low-cost round cells, 27.5 mm dilution vials fit cell holder sleeve; a unique small-volume cell is also supplied
  • Additional alignment aperture—laser alignment is relatively simpler and faster

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