Bently Nevada 3500/40 125672-01 Proximity Transducer Monitor | Replacement, Equivalent & Selection Guide
The Bently Nevada 3500/40 (Part No. 125672-01) is a dual-channel proximity transducer monitor within the industry-standard 3500 Series Machinery Protection System. Designed for continuous vibration and position monitoring of rotating machinery, it is widely deployed in turbines, compressors, pumps, and motors across oil & gas, power generation, and heavy industry. This page provides full technical specifications, verified compatible replacements, equivalent models, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 125672-01 |
| Model | 3500/40 |
| Series | Bently Nevada 3500 |
| Function | Proximity Transducer Monitor (Dual Channel) |
| Measurement Type | Radial Vibration, Thrust Position, Differential Expansion |
| Input Channels | 2 (per module) |
| Transducer Compatibility | 3300 XL, 7200 Series Proximity Probes |
| Output | 4–20 mA, Relay, OK Relay |
| Power Supply | 18–32 VDC (from 3500 rack) |
| Weight | 920 g |
| Communication | Rack backplane (3500 System) |
| Approvals | SIL 1 capable; CE, CSA, FM |
| Operating Temperature | 0 °C to +65 °C |
| Form Factor | 3500 Series rack-mount module |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the Bently Nevada 3500/40 125672-01. Always verify electrical, mechanical, and software compatibility before substitution.
| Part Number | Brand | Type | Compatibility Notes |
|---|---|---|---|
| 125672-02 | Bently Nevada | Direct variant | Revised firmware version; same hardware form factor |
| 125672-03 | Bently Nevada | Direct variant | Extended temperature option |
| 3500/40M 176449-01 | Bently Nevada | Enhanced model | Adds Modbus/TCP; drop-in rack replacement |
| 3500/42M 140734-01 | Bently Nevada | Upgraded model | 4-channel version; same rack slot |
| VM600 MPC4 200-581-000-013 | Meggitt (Vibro-Meter) | Third-party equivalent | Dual-channel; requires VM600 rack; verify I/O mapping |
| CMCP530 | Metrix / Roper Technologies | Third-party equivalent | Dual-channel proximity monitor; standalone or rack |
Contact support@konmask.com for cross-reference verification before ordering a replacement.
Why Choose the Original Model
- Proven reliability – 3500 Series is the global benchmark for machinery protection in critical rotating equipment.
- Seamless integration – Plug-and-play within any existing 3500 rack without reconfiguration of adjacent modules.
- OEM firmware support – Full compatibility with System 1 Evolution and Bently Nevada configuration software.
- Regulatory acceptance – Widely accepted by EPC contractors and end-users under existing FAT/SAT documentation.
- Long service life – Designed for 24/7 continuous operation in harsh industrial environments.
Typical Applications
- Steam and gas turbine radial vibration monitoring
- Centrifugal compressor shaft displacement measurement
- Pump and motor bearing condition monitoring
- Thrust position monitoring for axial machinery protection
- Differential expansion measurement on large turbomachinery
System Compatibility
- Rack: Bently Nevada 3500 Rack (3500/05, 3500/15, 3500/20, 3500/22M)
- Transducers: 3300 XL 8mm, 3300 XL 11mm, 7200 Series proximity probes and extension cables
- Software: System 1 Evolution, Bently Nevada 3500 Rack Configuration Software (RCS)
- Communication: Rack backplane; optional Modbus/TCP via gateway module
- Power: Supplied via 3500 rack power module (3500/15 or 3500/05)
Selection Guide
Use the decision criteria below to select the correct module for your application:
| Requirement | Recommended Model |
|---|---|
| Standard dual-channel proximity monitoring | 3500/40 125672-01 (this model) |
| Need Modbus/TCP communication | 3500/40M 176449-01 |
| Need 4 channels in one slot | 3500/42M 140734-01 |
| Non-Bently rack environment | Metrix CMCP530 or Meggitt VM600 MPC4 |
| Extended temperature range required | 125672-03 |
| Replacement for failed unit, same rack | 125672-01 or 125672-02 (direct swap) |
Quality Assurance & Sourcing
- All units sourced through verified industrial distributors and authorized supply channels.
- Each module undergoes visual inspection and functional verification prior to shipment.
- Traceability documentation (COC, test records) available upon request for critical applications.
- Packaging: anti-static, foam-lined, with original or equivalent protective enclosure.
- Lead time: typically 3–7 business days for in-stock units; contact us for urgent requirements.
How to Order
- Confirm your rack model and existing module firmware version with your site engineer.
- Verify transducer type (3300 XL or 7200 Series) and cable lengths.
- Contact support@konmask.com or call +0086 19859288691 with your PO or RFQ.
- Provide delivery address and any documentation requirements (COC, test report).
- Receive order confirmation and tracking within 1 business day.
Replacement & Compatibility FAQ
Q: Can I replace 125672-01 with 125672-02 without reconfiguring the rack?
A: Yes. The 125672-02 is a direct hardware equivalent with updated firmware. No rack reconfiguration is required.
Q: Is the 3500/40 compatible with 7200 Series probes?
A: Yes, the 3500/40 supports both 3300 XL and 7200 Series proximity transducers when configured correctly in RCS.
Q: Can a third-party equivalent replace the 3500/40 in a safety-instrumented system?
A: Only if the replacement has been independently validated for your SIL level and accepted by your functional safety engineer. We recommend using original Bently Nevada modules for SIS applications.
Q: Do you supply new, refurbished, or surplus units?
A: We supply new and certified-surplus units. Condition is clearly stated on each order confirmation. Contact us to specify your preference.
Q: What is the warranty?
A: 12-month warranty on all units against manufacturing defects. Surplus units carry a 90-day functional warranty.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
