3500/42M Proximitor/Seismic Monitor

The Bently Nevada 3500/42M is a 4-channel monitor in the 3500 Series machinery protection system, providing continuous vibration, axial position, and differential expansion monitoring for critical rotating equipment. Each channel is independently configurable for the measurement type, full-scale range, alarm setpoints, and time delays.

3500/42M modules are triple-redundant for SIL-2 and SIL-3 safety instrumented functions. They support BNC-style buffered outputs for connection to portable data collectors and oscilloscopes during commissioning and troubleshooting. The module is hot-swappable — replacement does not require rack shutdown.

Typical Applications

• Steam and gas turbine vibration monitoring
• Centrifugal compressor axial position protection
• Hydro turbine bearing wear monitoring
• LNG compressor train machinery protection