Bently Nevada 140734-01 – Four?Channel Proximity Probe Monitor for 3500 Series Machinery Protection

• Warranty: 365 days

• Delivery: 1 week if in stock; no more than one month at the latest

• Payment: 50% advance payment; full payment before delivery

• Express options: FedEx, UPS, DHL

• Four independent channels – Monitors radial vibration, axial position, or clearance using eddy-current proximity probes.

• Direct compatibility with Proximitor systems – Works with Bently Nevada 3300 XL (5 mm/8 mm) and similar drivers for consistent calibration and scaling.

• Buffered dynamic outputs – Each channel provides a buffered output for portable analyzers; handy for route-based diagnostics.

• Rack-integrated protection – Alert/Danger alarms processed in the 3500 rack for fast trip logic and relay action (via rack relays).

• Configurable setpoints and measurement modes – Typically supports common displacement/vibration parameters with flexible alert bands.

• Seamless system communications – Status and data pass through the rack TDI/communications cards for DCS/PLC connectivity.

• Single-wide monitor form factor – Simplifies spares management and reduces downtime during replacement.

This module is typically used where continuous shaft displacement or vibration must be monitored with high reliability:

• Oil & gas – centrifugal compressors, turboexpanders, gearboxes

• Power generation – steam and gas turbines, generator bearings

• Refining & petrochemical – process pumps, fans, blowers

• Pulp & paper and metals – large motors, roll stands, critical bearings

One thing I appreciate is how it keeps protection simple: the monitor handles the raw measurement, while the rack coordinates alarms and relays. In many cases, this keeps both maintenance and compliance audits straightforward.

• Reliability – Proven 3500 architecture with fast alarm handling and redundant rack options.

• Compatibility – Works with installed Bently Nevada proximity probe systems; minimal rewiring.

• Lower lifecycle cost – Reuse of existing probes and termination hardware reduces project hours.

• Diagnostics access – Buffered outputs support portable data collectors for detailed analysis.

• Engineering efficiency – Central configuration via the 3500 software; consistent scaling across trains.

Feedback from maintenance leads: “Swapping a spare 140734-01 during a night shift took less than 30 minutes. We validated channel gaps, pushed the config from our last backup, and the compressor was back online before the hour.”

• Panel/Rack – Install in a Bently Nevada 3500 rack (19-inch). Keep adequate ventilation; avoid heat sources and high-EMI zones.

• Wiring – Use shielded, correctly grounded cabling from Proximitor drivers to the rear I/O. Separate from VFD/motor power cables to minimize noise.

• Configuration – Set probe type, scale factors, and Alert/Danger setpoints in the 3500 configuration software. Verify polarity and channel assignments.

• Commissioning checks – Confirm gap voltages at the Proximitor, validate full-scale readings with a known target or accepted procedure, and test rack alarms/relays.

• Routine maintenance – Periodically inspect terminals for looseness/corrosion, review trend/alarm logs, and capture buffered waveforms if behavior changes.

• Firmware & records – Keep rack/TDI firmware current per site policy; store monitor configuration backups with revision notes.

• Safety – De-energize the rack slot or follow hot-swap procedures per site EHS rules; observe ESD handling.

• CE marked; RoHS compliant in most cases

• Manufactured under ISO 9001 quality systems

• UL/cUL recognition is commonly available for 3500 system components

• Supplier warranty: 365 days (as stated above)

• Bently Nevada 3300 XL Proximity Probe System (5 mm / 8 mm) – probe, extension cable, and Proximitor driver

• Bently Nevada 3500/32M Relay Module – for shutdown and alarm relay outputs at rack level

• Bently Nevada 3500/22M TDI – system communications and configuration interface

• Bently Nevada 3500/93 System Display – on-skid visualization of key parameters and alarms

If you’re refreshing a train or building a spare strategy, this module seems to be one of the safer bets: it keeps your 3500 ecosystem consistent and your proximity measurements dependable.