Farr Air Pollution Control (www.farrapc.com) developed a mobile fume and dust collector as an economical filtration system for welding workshops and industrial settings. The company says its Farr Cart unit is a powerful tool that can be used to extract moderate concentrations of smoke and light dust generated by intermittent processes such as welding and grinding, with welding fume extraction of more than 99 percent efficiency. The machine has large rubber wheels, and is designed for mobility and use where space is tight.