FIG. 1 is a perspective view of the process gas chromatograph. FIG. 2 is a top plan view of the process gas chromatograph. FIG. 3 is a front elevational view of the process gas chromatograph. FIG. 4 is a right side view of the process gas chromatograph. FIG. 5 is a rear elevational view of the process gas chromatograph. FIG. 6 is a left side view of the process gas chromatograph; and, FIG. 7 is a bottom view of the process gas chromatograph.