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 mode and 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

Other Equipment by this Supplier

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.