A professional who operates atmospheric tunnel driers that heat liquids or slurries to remove water or other volatile liquids. Respnsibilities include:

• Moves controls to regulate preheaters, fans, and conveyor belts or other material feeding mechanisms to maintain continuous operation.
• Turns steam valves and sets automatic temperature controls to attain specified drying temperature.
• Observes temperature charts and conveyors to correct equipment malfunctions and jamming of feed or discharge conveyors.
• Examines and feels materials for moisture content or obtains sample for laboratory moisture analysis, and readjusts equipment controls to attain specified product.
• Stops drier units in sequence as material feed is exhausted.
• Records data, such as type and quantity of material dried and drying time.
• May tend continuous pan driers that automatically transfer materials through drier in pans on conveyor chains, and dumps dried contents after drying.
• May tend or feed auxiliary equipment, such as grinding mills and baling machines that process dried product.
• May be designated according to type of drier as continuous-conveyor-screen drier.