The newest is the Model M, which can be set up for evaluation of a variety of membrane formats including spiral-wound, ceramic, stainless steel and hollow fiber.GEA Filtration; Hudson, Wis.715-386-9371; www.geafiltration.comSifting out impuritiesPlaced in pneumatic unloading or transfer systems, the in-line Tru-Balance sifter eliminates equipment such as cyclone receivers, airlocks, receiving hopp