Brookhaven - Model BI-200SM -Research Goniometer

With a Brookhaven Instruments BI-200SM Research Goniometer System, this rich field of exploration is open to you for studies of both Static Light Scattering (SLS) and Dynamic Light Scattering (DLS).

The Bl-200SM Research Goniometer System provides access to all of these studies with an automatic, modular, and versatile system. It is a precision instrument designed for exacting scattering measurements. Based on a special turntable with precision ball bearings and a stepping motor, the Bl-200SM’s modern design and quality construction guarantee precise measurements due to the wobble-free movement of the detector. It is field-proven in hundreds of laboratories. It is ideal for macro-molecular studies and submicron particle sizing.

By taking advantage of the multiple inputs available on the TurboCorr correlator a new capability of the BI-200SM system is created. By adding an optical signal splitter to the beam of scattered light and a second detector it is possible to eliminate the effects of very high-speed interference from the detector(s). This Cross-Correlation System provides remarkably clean information as seen in the article we have presented.

The BI-200SM Research Goniometer modularity simplifies system expansion. Featuring a standard optical rail, the BI-200SM can be used with neutral density filters, a polarizer, an analyzer, and a reference detector. Special sample requirements can often be met by changing the cell holder design or size.

• Stepping motor controlled, multiangle measurements
• Particle size and size distributions
• M_w, R_g, A₂ for dilute polymer solutions
• Cross-correlation detector option
• Avalanche photodiode detector option
• CONTIN, Zimm, Guinier, Fractal, and more

• Both DLS and SLS modes: Correlation & Intensity Measurements
• Large angular Range: 8° to 155° with 25mm cells: 15° to 155° with 12 mm cells.
• Fine Adjustment Control: Read angle to 0.01° directly on large, fine-control adjustment knob.
• Open Design/Standard Optical Rails: Facilitates user customizations for special purposes.
• Temperature Control: Heating and cooling via any standard external circulator Separate temperature and filtration plumbing.
• Special Design Glass Vats: Specially polished and flat entrance window ensures minimum flare.
• Alignment Cell: Fine-screw vertical adjustment makes finding the center of rotation easier.
• Multiple Laser Line Filters: Filter wheel with 632.8 (HeNe), 514.5/488.0 nm (Ar+), one open position for weak scatterers, and 2 blank (shutter) positions. Also available with 532 nm bandpass filter
• Enhanced Viewing Optics: Coated, precision achromats coupled with behind-the-slit viewing and high-quality eyepiece make alignment easier.
• Additional Alignment Aperture: Alignment of laser much simpler and faster.
• Variety of Cell Holders: High precision cell holders standard, low-priced round cells available: 27.5 mm dilution vials fit cell holder sleeve. Special small-volume cell available.