While liquid tank level is one of the basic measurements used in process plants, its importance cannot be overstated. Incorrect high level measurements can cause vessels to overflow leading to lost product, a safety hazard or an environmental problem. Incorrect low level measurements can burn out pumps and can cause problems with inventory control. 

Enter differential pressure level measurement, which infers liquid level in a vessel by measuring the pressure generated at the bottom of the vessel.

To better understand this long-standing technology, Chemical Processing spoke with Nicholas Meyer, Industry Marketing Manager, Yokogawa Corporation of America.