BI-RIVS Differential Refractive Index and Viscometry Detector

The BI-RIVS is a true Dual-Detector Differential Refractometer and Viscometer sets a new standard for the detection of intrinsic viscosity of highly diluted GPC/SEC samples.

The refractometer is an integral component of the viscometer bridge allowing for the measurement of concentration and viscosity take place on the exact same sample segment, at the very same time. This combination allows a much more accurate determination of molecular parameters and is particularly suited for applications focused on the structure and branching of the investigated polymer.

The BI-RIVS Dual-Detector is compatible with all kinds of applications, at any temperature up to 80 °C and with any solvent.

Features at a Glance

•Dual detector•Up to 80 °C•Maximizessensitivity

Viscometer Specifications

Differential Pressure Range ±5.0 kPa

Differential Pressure Gains 1, 2, 4, 8

Inlet Pressure Range 0 to 150 kPa

Sample Cell Volume 15 µl

Shear Rate (1.0 ml/min) ≤ 2,700 sec-1

Noise Level 0.2 Pa, diff. Pressure Channel, 25 °C

Analog Output (integrator) 1.0 Volt / 5 kPa FSD Differential Pressure; 1.0 Volt / 100 kPa FSD Inlet Pressure

Refractive Index Detector Specifications

Refractive Index Range 1.00 to 1.75

Cell Volume 8 µl

Measurement Ranges (Δ Full Scale)6×10-4, 3×10-4, 1.5×10-4, 7.5×10-5

Noise Level < 2.5×10-9ΔRIU, 25 °C

Analog Output (integrator) 1.0 Volt FSD

Common Specifications

Total Detector Volume ≈ 40 ml (including reservoirs)

Temperature Accuracy ± 0.5 °C

Temperature Stability > 0.01 °C

Digital Interface RS232C; USB; LAN

Data Transfer Rate (baud) 4800, 9600, 19200, 57600, 115200

Digital Inputs Flush, Zero, Sync, Error

Digital Outputs Sync, Error