Wyatt Technology Optilab rEX Refractive Index Detector

The Optilab rEX measures the dRI between the current liquid sample stream and a liquid (usually clean solvent) previously stored as a reference. The dRI is measured at a fixed wavelength determined by a Light Emitting Diode (LED)/fiber light source. The light source consists of a high-powered LED coupled to a special optical fiber. This “pigtail” configuration allows you to easily replace the light source. If you want to change the measurement wavelength, installing a “pigtail” with a different wave-length accomplishes this.The dRI data can be read from the LCD display, the analog output channel, or digitally through the Ethernet port. Since the dRI of liquids depends critically on temperature, the instrument has a system that precisely regulates the temperature of both the flow cell and the optics.In addition to the dRI between two liquids, with the same liquid present in the sample and reference chambers, the Optilab rEX measures the aRI of that liquid.