After detecting major discrepancies between metered input and output for a demanding batch process, a multibillion dollar UK-based chemical producer knew that its installed Coriolis meters were not “seeing” the entire output for the batch. But what was causing the problem? To find out, they installed a Foxboro® CTF50 Coriolis flowmeter in series with the existing meter, plus a chart recorder to track second-by-second flow performance and measurement. What kinds of measurements illustrated the problem, and which meter ultimately solved the problem? Find out in this informative case history.