
Product Description
🎯 Bently Nevada 3500/42M Proximitor Monitor (138708-01)
Why Machinery Professionals Choose the 3500/42M
When critical rotating equipment demands continuous protection, the Bently Nevada 3500/42M Proximitor Monitor delivers uncompromising reliability. This 4-channel monitoring powerhouse accepts proximity, velocity, and acceleration transducer inputs, providing comprehensive shaft vibration analysis that prevents catastrophic failures and maximizes uptime in your most demanding applications.
❓ Frequently Asked Questions
Q: What types of sensors can I connect to the 3500/42M?
A: The 3500/42M accepts 1 to 4 transducer inputs including Proximitor sensors for shaft displacement, Velomitor sensors for velocity measurements, and Seismoprobe accelerometers. The internal termination design (138708-01) simplifies wiring and reduces installation time by up to 40%.
Q: How does this monitor protect my rotating equipment?
A: The 3500/42M continuously analyzes vibration signatures from your machinery, comparing real-time data against configurable alarm setpoints. When abnormal conditions are detected—such as bearing wear, misalignment, or imbalance—the monitor triggers immediate alerts and can initiate automatic shutdown sequences, preventing minor issues from escalating into costly failures.
Q: What's the difference between internal and external terminations?
A: The 138708-01 features internal terminations, meaning all sensor connections are made directly to the module's built-in terminal blocks. This eliminates the need for separate I/O modules, reduces potential failure points, and creates a more compact installation footprint—ideal for space-constrained control rooms.
📊 Technical Specifications at a Glance
| Parameter | Specification | Benefit |
|---|---|---|
| Input Channels | 4 independent channels | Monitor multiple bearing positions simultaneously |
| Input Impedance | 10 kΩ (Proximitor/Acceleration) | Ensures accurate signal transmission |
| Power Consumption | 7.7W typical | Energy-efficient operation |
| Operating Temperature | -30°C to +65°C | Performs in extreme environments |
| Module Weight | 0.20 kg (0.44 lb) | Lightweight, easy installation |
| Dimensions (H×W×D) | 241.3 × 24.4 × 99.1 mm | Compact rack-mount design |
🏭 Real-World Application Scenarios
Power Generation
Challenge: A 500MW steam turbine requires continuous monitoring of journal bearings at four radial positions.
Solution: The 3500/42M monitors all four bearing positions with Proximitor sensors, detecting shaft displacement anomalies before they cause turbine trips. Result: 99.7% uptime achieved.
Oil & Gas Compression
Challenge: Offshore platform compressor experiences frequent unplanned shutdowns due to bearing failures.
Solution: Deployed 3500/42M with velocity transducers to track bearing condition trends. Predictive alerts enabled scheduled maintenance, reducing emergency shutdowns by 85%.
Petrochemical Processing
Challenge: Critical process pump requires multi-parameter vibration monitoring for API compliance.
Solution: 3500/42M configured with mixed sensor types (proximity + acceleration) provides comprehensive vibration profile. Meets API 670 standards while simplifying system architecture.
Pulp & Paper Mills
Challenge: Paper machine dryer section motors need vibration monitoring in high-humidity environment.
Solution: The 3500/42M's 95% non-condensing humidity rating ensures reliable operation. Seismoprobe inputs detect motor bearing degradation weeks before failure, enabling proactive replacement.
⚙️ Configuration & Sensor Compatibility
🔌 Supported Sensor Configurations
💡 Pro Tip: Mix sensor types on different channels to capture both displacement (proximity) and dynamic vibration (velocity/acceleration) for comprehensive machinery diagnostics.
✅ Key Advantages Over Competitive Solutions
Faster Installation
Internal terminations eliminate external I/O modules, cutting installation time by 40%
Superior Accuracy
10 kΩ input impedance ensures minimal signal degradation and precise measurements
Flexible Deployment
4 independent channels adapt to single-machine or multi-train monitoring needs
🛠️ Installation & Integration Guide
⚠️ Installation Best Practices
- Rack Positioning: Install in Bently Nevada 3500 Series rack with adequate ventilation (minimum 2-inch clearance)
- Sensor Wiring: Use shielded cables for all transducer connections; ground shields at monitor end only
- Power Verification: Confirm rack power supply provides sufficient capacity (7.7W per module minimum)
- Configuration Software: Use 3500 Rack Configuration Software to set alarm thresholds and communication parameters
- Commissioning: Perform baseline vibration measurements during normal operation for accurate alarm setpoint calibration
📦 What's Included
- ✓ 1× Bently Nevada 3500/42M Monitor Module (138708-01)
- ✓ Internal termination blocks (pre-installed)
- ✓ Rack mounting hardware kit
- ✓ Installation and configuration manual
- ✓ Factory calibration certificate
- ✓ 12-month manufacturer warranty
Note: Transducers, cables, and 3500 Series rack sold separately
🌐 System Integration Capabilities
The 3500/42M seamlessly integrates into comprehensive machinery protection ecosystems:
- Modbus Communication: Connect to DCS/SCADA systems via 3500/92 Communication Gateway
- Data Historian Integration: Stream vibration data to OSIsoft PI, Honeywell PHD, or similar platforms
- Remote Monitoring: Enable cloud-based condition monitoring through System 1 software
- Alarm Relay Outputs: Trigger shutdown logic or annunciator panels via 3500/32 Relay Module
- Transient Data Capture: Pair with 3500/22M for high-speed waveform recording during events
🏆 Why Bently Nevada?
For over 60 years, Bently Nevada (a Baker Hughes business) has been the global standard in machinery protection. The 3500/42M represents decades of field-proven engineering, trusted by:
of Fortune 500
energy companies
installations
worldwide
global technical
support
📞 Expert Support & Resources
Need help selecting the right configuration? Our technical team provides:
- Free application engineering consultations
- Sensor compatibility verification
- System architecture design assistance
- Post-installation commissioning support
- Training on 3500 Rack Configuration Software
📋 Check Below Popular Items for More Information
| Brand | Description | Price (USD) | Stock | Link |
|---|---|---|---|---|
| Bently Nevada | 3500/05 Instrument Rack (02-05-00-00-00) | 1708-2708 | 400 | Instrument Rack ➜ |
| Bently Nevada | 3500/15 AC Power Supply Module (127610-01) | 291-1291 | 300 | AC Power Supply Module ➜ |
| Bently Nevada | 3500/60 Temperature Modules (163179-01) | 1593-2593 | 600 | Temperature Modules ➜ |
| Bently Nevada | 1701/25 Seismic Input Monitor for Velocity Input (01) | 748-1748 | 200 | Seismic Input Monitor ➜ |
| Bently Nevada | 330104-00-07-10-02-00 3300 XL 8 mm Proximity Probes | 962-1962 | 400 | 3300 XL 8 mm Proximity Probes ➜ |
| Bently Nevada | 3500/61 Temperature Monitor Module (163179-02) | 4443-5443 | 800 | Temperature Monitor Module ➜ |
Discover More Machinery Protection Solutions at Industrial Control Hub