Analyzing the exhaust stack of diesel engines is becoming of greater importance for maximum fuel savings and extending engine life. Also as scientists and doctors continue to find possible links between fossil fuel exhaust emissions and many different health-related problems. “The majority of the trackless and rail-bound machines used in opencast and underground hard-rock mines are powered by diesel. The industry is concerned about the health effects of employees exposure to diesel exhaust emissions and diesel particulate matter since these have recently been declared as carcinogenic. This is not only a health risk. It could close a mine.