A professional who tends crystallizer to process chemical solution into crystalline form. Respnsibilities include:

• Pumps specified amounts of materials and solvent or dumps drums of solutions into crystallizer.
• Starts agitator and pumps coolants into coils of crystallizer.
• Reads thermometer, observes product, and turns coolant valve to regulate temperature and control rate of crystallization according to specifications.
• May heat ingredients in crystallizer to prevent premature crystallization.
• May start centrifuge to separate crystallized substances from solvent.