This refinery gas analyzer has been designed using the concept known as “refinery gas in parallel”. Two separate signals from FID and TCD detectors respectively are analyzed independently by the gas chromatograph. However, the order of elution of the components is electronically handled in such a way that only one signal from either detector is analyzed at any point in time. This results in only one data acquisition file acquired by the data system which means that only one chromatogram and one report will be prepared for the entire sample analysis. This parallel design provides baseline resolution of more than 30 components and individual analysis of the C6+ compounds. The gas chromatograph is able to analyze hydrogen from 100ppm to approximately 99.9% including analysis of H2S. The refinery gas analyzer is completely automatic and has been physically configured to occupy the smallest possible bench space in the laboratory.