The Viscous Liquid Sampler for the Thermo Scientific™ Antaris II FT-NIR analyzer makes quick and reproducible quantitative analysis of viscous, non-reflective samples easy. The Viscous Liquid Sampler takes the time and hassle out of sampling high viscosity liquids such as syrups, pastes, and gels by eliminating cuvette, vial or tube filling and cleaning. Sampling of viscous materials for accurate quantitative analysis by transmission or transflectance requires a fixed pathlength. Traditionally pathlength was controlled by filling rigid sample containers which is a tedious, difficult and messy task that results in a slow and expensive analysis. The Viscous Liquid Sampler avoids these problems by allowing samples to be filled into a disposable polymer bag that can be simply thrown away after analysis.