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The RAVEM™ (Ride-Along Vehicle Emissions Measurement) system developed by Engine, Fuel, and Emissions Engineering Inc. of Sacramento, CA, provides laboratory-grade measurement of engine emissions under field conditions. 

Our research and development of on-board emission measurement systems began in 1994 and led to commercial sales of RAVEM™ systems beginning in 2003. The RAVEM™ is the only commercially available portable emission measurement system that can accurately measure diesel particulate emissions.

We sell custom-built RAVEM™ systems for laboratory and field use, and we use our own RAVEM™ to perform on-board and on-site emission measurements on engines, ranging from automobiles to container ships.