Since 1938 Witte has been designing and manufacturing drying, cooling and classifying equipment in New Jersey. One of the most popular product lines is for classifying products. Sometimes they are known as Witte Classifiers, Witte Screeners, Witte Plastic Pellet Screens or Witte Shakers. No matter what they are called, they have been a well-known brand in the plastics and many industries. Models include Series 200 and Series 700. Another key product for Witte is the vibrating fluid bed dryer for conveying, separating and drying. They offer a Series 400 Dyer/Cooler/Classifier, in addition, the stand-alone Fluid Bed Dryer and Fluid Bed Cooler.