BI-DCP Disc Centrifugation Photosedimentometer for High Resolution Particle Size Analysis

Brookhaven Instruments is known for providing light scattering instruments that are specifically designed for the characterization of sub-micron particle sizing and polymers. The company has identified the need to create high resolution in the size range of 1 µm and keeping this aspect in mind, it has designed an instrument based on a fractionation method that provides a resolution that exceeds any other method in this range.

BI-DCP Disc Centrifuge Photosedimentometer (DCP) is a high-resolution, digitally controlled particle size distribution analyzer. This advanced analyzer provides high-resolution results in the size range between 0.01 and 30 µm, with standard analysis time of 5 to 30 minutes.

The BI-DCP analyzer integrates a built-in strobe light that is synchronized to the drive circuit to assess the hydrodynamic stability of the sample. Furthermore, a sensor is used to track the disk temperature. The BI-DCP system provides the largest range of speeds, from 500 to 15,000 rpm, allowing an extended range of particle size measurements. Measurement time is reduced by a scanning detector head.

The DCP software provides for instrument control, database management and data analysis. The menu-driven software allows a wide range of report formats.

BI-DCP is supplied with the BI-DSC precision balanced disc made of PMMA that is suitable for non-aggressive solvents, weak acid and base solutions, and other non-aggressive aqueous systems.  The BI-DSCR is a polycarbonate disc that is suitable for aggressive solvents, ketones, aldehydes, and strong acid and base solutions.

Common applications for the BI-DCP include:

•Polystyrene, poly (vinyl chloride), and other polymer latexes
•Carbon blacks, metal oxides, and printing ink particulates

Features at a Glance

•High Resolution – Resolution of peaks as close as 13%
•No Calibration – Based on Stoke’s law for centrifugal sedimentation
•Extinction Coefficient Corrections – Allows for quantitative calculation of weight distributions
•Scanning Detector – Significantly reduces measurement time
•Powerful Modeling Software – Predicts optimum experimental method settings which significantly reduces operation time
•Cooling – Prevents baseline drift and improves sedimentation stability
•Digital Temperature readout – Continuous monitoring of temperature
•Option to do Line Start (LIST) or Homogenous Start Method (HOST)



Size range of 0.01 to 30 µm maximum; 0.05 to 10 µm typical for low density particles, 0.01 to 2 µm for high density particles; wide variety of materials dispersed in water and other solvents

Data System

Windows computer with printer. Real time graphics and data display, high resolution color (SVGA). Menu driven data analysis and management system, with single copy license and software distribution copy.

Drive System

Microprocessor controlled digitally driven electronic motor. Digital readout for setting and monitoring speed. Speed continuously variable from 500 to 15,000 rpm. Speed accuracy and stability better than + 0.01%. Temperature sensor and digital readout. Dual purpose integral strobe.

Disc Cavity

Polymethylmethacrylate with stainless steel hub. Dynamically balanced over range of roatational speeds. Spin fluid volume from 10 to 40 mL.

Power Requirements

100/115 VAC, 220/240 VAC, 50/60 Hz, 1,000 Watts


260 x 500 x 550 mm (HWD)


33 kg


CE Marked

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