If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. Bently Nevada 3500/42-01-01 Proximitor Seismic Monitor Overview The Bently Nevada 3500/42-01-01 Proximitor/Seismic Monitor is a four-channel machinery protection monitor for the 3500 Machinery Protection System . It accepts inputs from both proximity transducers and seismic sensors , conditions *Your Name: *Your Email: *Your Name: *Vdcode: Submit