The Demulsibility Characteristics Tester (DCT) is a device used to evaluate the ability of petroleum oils and synthetic fluids to separate from water. Demulsibility refers to the capability of an oil or fluid to separate from water after being emulsified. Here are some key words associated with the Demulsibility Characteristics Tester.Labtron is designed and made as per “Test Methods for Demulsibility Characteristics of Petroleum Oils and Synthetic Fluids” ASTM D1401