The Wyatt Technology Optilab T-rEX dRI Detector WTREX-13 is a high-performance differential refractive index detector designed for advanced polymer and biopolymer analysis. It features a built-in flow cell containing ethanol and a leak sensor rinse system for enhanced reliability. The system includes the T-rEX detector and the T-rEX OS II module, providing comprehensive configuration for precise refractive index measurements.