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 3500/04 136719-01 + 138527-01 Internal Barrier Introduction The Bently Nevada 3500/04 136719-01 + 138527-01 Internal Barrier is an integral part of the 3500 Series Machinery Protection and Monitoring System . This internal barrier is specifically designed to protect the systems input/ou *Your Name: *Your Email: *Your Name: *Vdcode: Submit