Bently Nevada 3500/42M 140734-99 Proximitor Seismic Monitor

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Product Description

The Bently Nevada 3500/42M Proximitor*/Seismic Monitor (140734-99) is a 4-channel vibration monitoring module for the 3500 Machinery Protection System rack — the most widely used monitor in the 3500 series. It delivers continuous, real-time measurement of both dynamic vibration and position-related signals, providing dependable machinery protection for critical rotating equipment across power generation, oil & gas, petrochemical, and heavy industrial applications.

A key strength of the 3500/42M is its flexibility: each channel can be independently configured to accept input from proximity probes, velocity transducers, or accelerometers, and can display a wide range of measurement parameters including:

• Radial vibration (shaft vibration relative to the bearing)
• Axial (thrust) position
• Case / bearing housing vibration
• Peak or average vibration values
• Tachometer readings (on one channel, using the internal keyphasor input)

When measured parameters exceed configured Alert or Danger setpoints, the module drives alarm outputs for operator notification and can trigger relay action via the 3500/34 relay module — protecting turbines, compressors, pumps, fans, and motors from catastrophic damage.

Key Features

• 4 independent channels — each configurable for a different transducer type and measurement parameter
• Multi-transducer compatibility — accepts 3300 XL and 7200 series proximity probes, velocity transducers, and accelerometers
• Simultaneous radial & axial measurement — supports full vibration and position protection in one module
• Programmable Alert & Danger setpoints — 2 Alert + 2 Danger alarms per channel with configurable time delays and latching options
• Dual alarm drive architecture — independent alarm drives enable flexible voting logic with 3500/34 relay modules
• Front panel LED indicators — OK, Alarm/Danger, Bypass, and Config Fault status at a glance
• Hot-swappable design — module replacement without powering down the 3500 rack
• Software configuration — fully configurable via 3500 Rack Configuration Software, eliminating hardware adjustments
• Proven reliability — the industry-standard monitor for Bently Nevada 3500 protection racks worldwide

Technical Specifications

⚠️ *Specifications may vary depending on I/O module type and firmware version. Contact our team to confirm the correct I/O module combination for your transducer system.*

Applications

• Steam turbine and gas turbine vibration monitoring in power plants
• Compressor train protection in LNG, refining, and petrochemical facilities
• Pump, fan, and motor monitoring in water treatment and general industry
• Thrust position monitoring for fluid-film bearing machinery
• Paper mill, steel mill, and heavy rotating equipment protection programs

Why Buy From Us?

• ✅ In stock — large inventory of 3500 series modules for same-day dispatch
• ✅ 12-month warranty on every module
• ✅ Tested & verified — each unit inspected before shipment
• ✅ Global shipping — DHL / FedEx / UPS express delivery
• ✅ Technical support — experienced engineers available for configuration and troubleshooting
• ✅ Competitive pricing — contact us for volume discounts and project packages

3500/42M 140734-99

Frequently Asked Questions (FAQ)

Q1: What is the difference between the 3500/42M and 3500/40M?
A: The 3500/40M accepts proximity probe (Proximitor*) inputs only, while the 3500/42M is a dual-purpose monitor that also accepts seismic inputs — velocity transducers and accelerometers. The 3500/42M offers greater channel flexibility and is the more versatile choice for mixed measurement applications.

Q2: How many channels does the 3500/42M have?
A: It provides 4 independent channels, each of which can be configured for a different transducer type and measurement parameter.

Q3: Which transducers are compatible with the 3500/42M?
A: It supports Bently Nevada 3300 XL and 7200 series proximity probe systems, plus velocity transducers and accelerometers — the exact I/O module depends on your transducer selection.

Q4: Is the 3500/42M hot-swappable?
A: Yes. The module can be replaced while the rack remains powered, following proper safety procedures.

Q5: What is the lead time and warranty?
A: In-stock items typically ship within 24–48 hours. All modules come with a 12-month warranty.

Request a Quote

Need the Bently Nevada 3500/42M 140734-99 for your machinery protection system? Contact us today for pricing, availability, and technical documentation.

BENTLY BRAND

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