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Product Introduction
The Bently Nevada 3500/45 140072-04 Position Monitor is a precision machinery protection module designed to measure axial shaft position and thrust position in critical rotating machinery. Part of the renowned 3500 Series, this module ensures continuous monitoring of shaft displacement, providing early warning of misalignment, bearing wear, or mechanical drift.
It features high-resolution measurement and advanced digital signal processing to deliver accurate, reliable readings in real time. Configurable alarm logic allows users to define Alert and Danger thresholds to match specific machinery requirements. The 3500/45 140072-04 integrates seamlessly into the 3500 rack system, supporting centralized data acquisition, plant-wide condition monitoring, and predictive maintenance strategies.
This module is widely used in industries such as power generation, petrochemical, oil & gas, and other process sectors where precision position monitoring is critical for safety and operational reliability.
Product Specifications
| Parameter | Description |
|---|---|
| Model Number | 3500/45 140072-04 |
| Series | Bently Nevada 3500 Machinery Protection System |
| Measurement Type | Axial shaft position, thrust position |
| Number of Channels | 2 or 4 channels |
| Supported Sensors | Proximity probes, eddy current transducers |
| Signal Processing | Direct position measurement with programmable alarm thresholds |
| Measurement Range | ±2 mm to ±5 mm (sensor dependent) |
| Frequency Response | DC to 10 kHz |
| Resolution | Micrometer-level (sensor dependent) |
| Dynamic Range | > 80 dB |
| Sampling Rate | Up to 1024 samples per channel per second |
| Alarm Types | Alert and Danger, independently programmable |
| Outputs | 4–20 mA proportional output, relay contacts, buffered outputs |
| Communication Interface | 3500 rack network compatible |
| Operating Temperature | -30°C to +65°C |
| Power Supply | Via 3500 rack backplane |
| Dimensions | 241.3 x 24.4 x 241.8 mm |
| Weight | 0.91 kg |
| Mounting | Plug-in module for 3500 rack |
| Certifications | CE, CSA, ATEX, IECEx (depending on configuration) |
Product Applications
The 3500/45 140072-04 Position Monitor is used in machinery protection applications requiring high-precision shaft position monitoring:
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Steam Turbines – Monitors axial thrust position to prevent bearing overload.
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Gas Turbines – Tracks shaft displacement to ensure bearing integrity.
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Centrifugal Compressors – Protects against axial drift caused by process instability.
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Reciprocating Compressors – Measures rod and crosshead positions to detect alignment or wear issues.
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Industrial Pumps – Monitors shaft axial displacement to prevent seal and bearing damage.
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Gearboxes – Tracks axial shaft position to detect gear wear or misalignment.
Product Advantages
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High Accuracy – Delivers micrometer-level measurement for critical machinery protection.
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Flexible Sensor Support – Works with a wide range of proximity and eddy current probes.
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Configurable Alarm Logic – Independent Alert and Danger setpoints for proactive protection.
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Seamless 3500 Rack Integration – Centralized monitoring and data acquisition.
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Robust Industrial Design – Reliable in high-vibration, high-temperature environments.
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Predictive Maintenance Support – Provides real-time readings and long-term trend data for maintenance planning.
FAQ
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What measurements can the 3500/45 140072-04 module perform?
It measures axial shaft displacement and thrust position to protect critical machinery. -
Which sensors are compatible with this module?
It supports Bently Nevada proximity probes and eddy current transducers. -
Can it monitor both static and dynamic axial movement?
Yes, it captures both slow drift and rapid axial displacement. -
How are alarm thresholds set?
Alert and Danger thresholds are independently configurable via 3500 Configuration Software. -
What is the module’s maximum frequency response?
It supports DC to 10 kHz, depending on the sensor used. -
Does the module provide proportional outputs?
Yes, 4–20 mA outputs are proportional to the measured shaft position. -
Is buffered output available for portable devices?
Yes, buffered outputs allow connection of analyzers without interrupting system monitoring. -
Can the module be hot-swapped?
Yes, it can be removed or installed without shutting down the 3500 rack. -
Is it certified for hazardous environments?
Yes, with appropriate configuration it complies with ATEX, IECEx, and CSA standards. -
What is the sampling rate per channel?
Up to 1024 samples per channel per second for high-resolution monitoring.
Related Models (Same Series or Compatible)
| Model | Description |
|---|---|
| 3500/40M | Proximitor Monitor for shaft position and radial vibration. |
| 3500/42E | Vibration Monitor for radial, thrust, and shaft vibration. |
| 3500/44M | Aeroderivative Gas Turbine Vibration Monitor. |
| 3500/46M | Hydro Monitor for hydroelectric turbine vibration. |
| 3500/50 | Tachometer Module for speed measurement. |
| 3500/60 | Temperature Monitor for bearings and casings. |
Popular Bently Nevada Models
| Model | Description |
|---|---|
| 3500/15 | Power Supply Module for 3500 systems. |
| 3500/20 | Rack Interface Module for system communication. |
| 3500/25 | Keyphasor Module for phase reference signals. |
| 3500/32M | Relay Module for alarm logic. |
| 3500/65 | Velocity Monitor for casing-mounted sensors. |
| 3500/77M | Recovery Delay Module for alarm management. |
