The Andersen 2000 and Montair Andersen bv packed bed scrubbing equipment includes countercurrent, vertical flow packed beds, and crossflow horizontal scrubbers. These units are used to absorb gas phase contaminants from an exhaust gas stream. They are normally combined with chemical treatment equipment to not only collect the gas phase contaminants, but convert them into harmless chemical substances which can be recovered or easily disposed.

Andersen packed beds are available in fiberglass reinforced polyester, stainless steel, high nickel alloys, mild steel, rubber lined steel and ceramics. The counter flow scrubbers are normally used for large air pollution control sources. The cross flow scrubbers are used in applications such as laboratory hood exhausts, small electroplating operations, and other small emission sources. They are also used in odor control applications where a low profile is necessary. Fans can be provided which are integral with the packed bed. A variety of packing materials is available, including PVC, polyethylene, polypropylene, fluorocarbons, ceramics, and various metals.