The Shimadzu System GC is an advanced, application-specific gas chromatography solution engineered for the comprehensive analysis of hydrocarbon streams in industries such as oil and gas, petrochemicals, and energy production. Unlike a conventional gas chromatograph, which requires users to configure methods, columns, and operating conditions, a System GC is delivered as a fully integrated and pre-validated platform that combines optimized hardware, dedicated flow path design, multi-column configurations, switching valves, and appropriate detectors—typically flame ionization detectors (FID) and thermal conductivity detectors (TCD)—with specialized software for automated control and data processing. These systems are designed to accurately separate, identify, and quantify individual hydrocarbon components ranging from light gases such as methane to heavier fractions, depending on the specific application, while also calculating critical physical and energy-related properties including calorific value, relative density, and Wobbe index.