MEXA-1300R is an exhaust gas analyzing device for production lines of four-and two-wheeled vehicles. The operator can draw a sample of exhaust gas by inserting piping into the tail pipe. CO, CO₂ HC, and O₂ (optional) can be measured in one simple operation. The operation and maintenance functions are clearly distinct. Filters are located in accessible positions for easy maintenance and replacement. The smooth compact body contributes to a safe and secure space at limited production sites. The piping hose connections are located in the lower dented area of the back for convenience.