The Clear Tube is a new option on Feedmax vacuum loaders from Wittmann Inc., Torrington, Conn. The Clear Tube of borosilicate glass mounts on a stainless-steel machine hopper with its own sight glass. A hinged top permits fast, easy access for cleaning by loosening two knurled knobs. A proximity sensor for level control on the Clear Tube assembly is positioned by set screws. Clear Tube loaders are available in JIT compressed-air models, IMX loaders with integral vacuum motors, and FMX receivers for central systems. Sizes range from 100 to 6000 lb/hr.