LVL-B Series vibration limit switches for level sensing of bulk solids are insensitive to material build-up, external vibration and flow noise. They are FM- and CSA-certified as dust-ignition-proof (DIP) for Class II and Class III, Divisions 1 and 2, Groups E-G. They have a 250-mm (10-in.) vibrating rod, and are available with 500-mm (20-in.), 1000-mm (40-in.) and 1500-mm (60-in.) extension pipes.