This apparatus is used to know the water in petroleum products or bituminous materials by distilling them with volatile solvent. The equipment consist of a  electric heater with thermoregulator, glass still, support stand, condenser, receiving trap, clamp.

Manufacturers and Suppliers of Water in Bituminous Material (Dean-Stark) in Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, Philippines, Tanzania, Uganda