BI-DNDC Differential Refractometer with Batch or GPC/SEC Modes

The BI-DNDC—a deflection-type refractometer from Brookhaven Instrument—has been designed for use in GPC/SEC or batch mode. The increment in specific refractive index, dn or dc, is established in batch mode.

This value is needed as a parameter in molecular weight measurements using light scattering. The dn/dc is already known in GPC/SEC modeand the instrument is utilized as a concentration detector for SEC or GPC applications.

All significant features can be programmed by users to obtain the highest flexibility. The BI-DNDC refractometer can be configured through the front panel controls and can be read through an external computer or the LED readout.

The BI-DNDC refractometer features a microprocessor, which makes it easy to handle all functions of the instrument. It also allows users to transfer refractive index and temperature data to a personal computer through a regular serial interface.

Most significantly, the BI-DNDC requires a warm-up time of just one hour, which is relatively less when compared to the other commercially available models.

Key Features & Specifications

DRI Cell Angle 45°C.

DRI Cell Volume 8μl.

Refractive Index Range (n0) 1.0 to 1.75 n.

Max Detection 1.4 x 10-3Δn.•Temperature Range Ambient to 80°C.

Specify Wavelength 620 nm, 535 nm or 470 nm, factory set ‡.

Software BI-DNDCW for Batch Mode measurements.

Power 90–230 V/65 W.•Temperature Accuracy ±0.1°C.

Temperature Stability > 0.05°C.

Digital Interface USB.•Weight 10 kg approx.•Size (W x H x D) 400 x 200 x 350 mm.

‡ A huge number of wavelength options are available to perfectly match the laser used in SLS, making sure your results will be perfect