What is a light liquid? Commonly referred to as light liquid hydrocarbons, these types of processes are most commonly known to fit between what can easily be distinguished as crude oil product, or natural gas streams. Light liquids fit a broad spectrum of process conditions spanning from NGLs, LPGs, condensates, high RVP liquids and refined products such as jet fuels and gasolines. Regardless of the application, Welker has the expertise, products and systems capable of collecting a comprehensive and representative sample in accordance with industry standards.