BENTLY NEVADA 3500/40M 176449-01 Proximitor Monitor | Replacement, Equivalent & Selection Guide
The Bently Nevada 3500/40M (Part No. 176449-01) is a dual-channel Proximitor Monitor designed for the 3500 Series machinery protection system. It conditions signals from proximity probes (eddy-current sensors) to measure radial shaft vibration, eccentricity, and position — critical parameters for rotating machinery protection in oil & gas, power generation, and heavy industry.
This page serves as a comprehensive selection guide for engineers sourcing the original module, compatible replacements, or equivalent alternatives.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 176449-01 |
| Model | 3500/40M |
| Brand | Bently Nevada (Baker Hughes) |
| Function | Dual-Channel Proximitor / Vibration Monitor |
| Measurement Type | Radial Vibration, Eccentricity, Position |
| Input Signal | Proximitor / Eddy-Current Probe (–24 VDC bias) |
| Channels | 2 (Channel 1 & Channel 2) |
| Output | 4–20 mA, Relay, OK Relay |
| Rack Compatibility | Bently Nevada 3500 Rack |
| Power Supply | Via rack backplane |
| Approvals | SIL 2 capable, CE, FM, CSA |
| Weight | ~700 g |
| Operating Temp. | 0°C to 65°C |
Compatible Replacement & Equivalent Models
The following modules are compatible replacements or functional equivalents for the 3500/40M 176449-01. Always verify firmware revision and rack slot compatibility before substitution.
| Part Number | Description | Compatibility Notes |
|---|---|---|
| 176449-01 | 3500/40M (Standard, this unit) | Direct match |
| 176449-02 | 3500/40M (Alternate suffix) | Verify I/O module pairing |
| 3500/40 | Earlier non-M variant | Functional equivalent; check firmware |
| 3500/42M | Proximitor / Velomitor Monitor | Broader sensor compatibility |
| 3500/44M | Aeroderivative Vibration Monitor | For aeroderivative turbines only |
| 3500/46M | Hydro Monitor | Hydro-specific applications |
Note: Suffix variants (e.g., -01, -02) may differ in I/O module pairing or internal configuration. Confirm with your system documentation or contact us for verification.
Why Choose the Original Model
- OEM-certified accuracy — factory-calibrated to Bently Nevada probe/extension cable system specifications
- SIL 2 rated — suitable for safety instrumented systems in critical machinery protection
- Seamless rack integration — plug-and-play with existing 3500 Series racks without reconfiguration
- Long-term support — backed by Baker Hughes global service network and spare parts availability
- Proven field reliability — widely deployed in refineries, compressor trains, and turbine protection systems worldwide
Typical Applications
- Centrifugal compressors and pumps (radial vibration monitoring)
- Steam and gas turbines (shaft position and eccentricity)
- Gearboxes and expanders in petrochemical plants
- Power generation turbine-generator sets
- Offshore platform rotating equipment
- LNG plant machinery protection systems
System Compatibility
| Component | Compatible Items |
|---|---|
| Rack | Bently Nevada 3500 Rack (standard & TMR) |
| Probes | 3300 XL 8mm, 3300 5mm, 7200 Series proximity probes |
| Extension Cables | Bently Nevada 3300 & 7200 Series extension cables |
| I/O Modules | 3500/40M-specific I/O module (verify part number) |
| Communication | 3500 System Monitor, Modbus, System 1 software |
| Power Module | 3500/15 Power Supply Module |
Selection Guide
Use the decision tree below to select the correct monitor for your application:
- Identify your probe type — Proximitor (eddy-current) → 3500/40M; Velomitor (velocity) → 3500/42M
- Confirm channel count — 2-channel standard; TMR applications require triple-module configuration
- Check measurement parameter — Radial vibration / eccentricity / position → 3500/40M is correct
- Verify suffix — Match the -01 or -02 suffix to your existing I/O module pairing
- Review SIL requirements — SIL 2 applications: confirm SIL certificate revision matches your SIS documentation
- Firmware revision — Ensure firmware is compatible with your System 1 software version
Quality Assurance & Sourcing
- All units sourced through verified industrial automation distributors and OEM-authorized channels
- Each module undergoes functional inspection and power-on verification prior to shipment
- Serialized traceability records available upon request
- Packaging: anti-static ESD bag + foam-lined carton, suitable for international air/sea freight
- Lead time: typically 3–7 business days for in-stock units; expedited sourcing available
How to Order
- Confirm part number: 3500/40M 176449-01
- Specify quantity and required delivery timeline
- Submit inquiry via support@konmask.com or WhatsApp +0086 19859288691
- Receive quotation with lead time and shipping options within 24 hours
- Place order — payment via T/T, PayPal, or platform checkout
Replacement & Compatibility FAQ
Q: Can I use a 3500/40 (without the M suffix) as a direct replacement for the 3500/40M?
A: Functionally similar, but the M-series introduced enhanced diagnostics and updated I/O module compatibility. Verify your I/O module part number before substituting.
Q: Is the 176449-01 compatible with both 3300 and 7200 Series probes?
A: Yes, when used with the appropriate extension cable and Proximitor. Confirm the probe/cable/Proximitor system is matched per Bently Nevada specifications.
Q: Can this module be used in a TMR (Triple Modular Redundant) rack?
A: Yes, three 3500/40M modules can be configured in a TMR arrangement within a 3500 TMR rack.
Q: Do you supply the matching I/O module?
A: Yes. Contact us with your rack configuration and we can supply the complete monitor + I/O module assembly.
Q: What is the warranty on sourced units?
A: We offer a 90-day functional warranty on all verified units. Extended warranty options available on request.
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Contact: support@konmask.com | +0086 19859288691
