COSA Xentaur introduces one of the first commercially available portable Optical Gas Calorimeters after extensive work with RIKEN KEIKI bringing this exciting new product to the world of spot calorific value determination of natural gases. The new CV PRO™ Optical Gas Calorimeter is targeted for the natural gas, appliance, boiler, industrial and process customers who need the portability and serviceability this small battery powered calorimeter. Optical measurement technology combined with COSA Xentaur’s forty years of calorimeter measurement methodology knowledge offers advantages to their customers for spot calorific sample measurement. This innovative optical technology greatly improves the analysis speed while reducing the size and weight of the instrument. The CV Pro™ represents the latest in the line of calorimeters for calorific value determination that includes COSA9610™ Wobbe Index calorimeter, portable and online gas chromatographs. The portable COSA CV Pro™ optical calorimeter format allows for unprecedented ease of use and serviceability in field use.