Brookhaven DNDC Refractometer
The Brookhaven Instruments BI-DNDC Refractometer is a deflection type Refractometer that may be purchased for use in either batch or GPC/SEC mode. In batch mode, the specific refractive index increment, dn/dc, is determined. This value is required as a parameter in molecular weight measurements using light scattering. In GPC/SEC mode, dn/dc is already known, and the instrument is used as a concentration detector for GPC/SEC applications.
All major features are user programmable in order to achieve the maximum flexibility. The BI-DNDC can be set using the front panel controls and read using the LED readout or by an external computer. It includes a microprocessor, which allows user-friendly handling of all functions of the instrument, as well as refractive index and temperature data transfer to a personal computer via a standard serial interface.
Most importantly, warm-up time for the BI-DNDC is only one hour, much less than other models on the market.
Features:
- Fast instrument warm-up, ~ 1 hour!
- Sensitivity, 2.5 x 109 ?RIU
- Autozero
- Reference cell flush
- 9 Measurement ranges
- DNDCW Windows™ software
- Active temperature control to 80 °C
- Wavelength selection: 620, 535 or 470 nm