Product Overview: 3500/42M 176449-02 + 138708-01
This assembly comprises a Bently Nevada 3500/42M Dual Channel Radial Vibration Monitor (part number 176449-02) combined with a related accessory, interface module, or specialized transducer package (part number 138708-01).
The 3500/42M is a core component of machinery protection systems, designed to continuously monitor the radial vibration of rotating equipment (such as turbines, compressors, and pumps) using signals from proximity probes (eddy current sensors).
The addition of 138708-01 typically indicates a probe extension cable, termination panel, signal conditioning accessory, or calibration module required for proper installation, signal integrity, or system compatibility.
Together, these components form a complete radial vibration monitoring channel compliant with industry standards such as API 670 and ISO 10816, enabling accurate detection of unbalance, misalignment, bearing wear, and other mechanical faults.
Key Parameters & Specifications
| Parameter Category | Specification | Remarks |
|---|---|---|
| System & Part Numbers | 3500/42M 176449-02 (Monitor Module) 138708-01 (Accessory/Kit) | Bently Nevada 3500 Series Dual-Channel Radial Vibration Monitor with specified accessory. |
| Form Factor | Single-slot 3500 series module (176449-02) + accessory-specific form factor (138708-01) | The accessory may be a cable, connector panel, or interface module. |
| Dimensions (Monitor Module) | 193 mm × 43 mm × 205 mm (7.6" × 1.7" × 8.1") | Standard 3500 series rack module size. |
| Weight (Monitor Module) | ~0.7 kg (1.54 lbs) | Typical for a 3500 series monitor. |
| Input Signal Type | –2 V to –22 V DC from eddy current proximity probes (typically 5 mm or 8 mm probes) | Accepts signals from industry-standard transducers. |
| Frequency Response | 0.3 Hz to 10 kHz (typical for vibration monitoring) | Covers common machinery vibration frequencies. |
| Dynamic Range | 0–500 µm (0–20 mils) peak-to-peak displacement | Configurable ranges via software. |
| Alarm & Trip Outputs | Two independent alarms per channel (Alert, Danger); 4–20 mA output per channel | Configurable relay and analog outputs. |
| Power Supply | +24 VDC via 3500 rack backplane | Powered through the system chassis. |
| Operating Temperature | 0°C to +65°C (32°F to 149°F) | Suitable for control room environments. |
| Accessory (138708-01) Description | Typical example: 10-meter extension cable with integral connectors for 3500/42M and proximity probes. | Exact function should be confirmed via accessory datasheet. |
| Compliance Standards | API 670, ISO 10816, CE, RoHS, ATEX/IECEx (if certified for hazardous areas) | Meets machinery protection and safety standards. |
Primary Application Scenarios
Power Generation (Gas & Steam Turbines)
Monitors turbine rotor vibration to prevent blade/rub interactions, detect imbalance, and avoid catastrophic failures. The accessory (138708-01) ensures reliable signal transmission from hot/critical areas to the monitoring rack.Oil & Gas (Centrifugal Compressors, Pumps)
Provides continuous vibration monitoring for high-speed compressors and pumps in upstream/midstream facilities. Dual-channel capability allows X and Y axis monitoring for full radial vibration analysis.Petrochemical & Refining
Protects critical machinery such as FCCU compressors, feed pumps, and turbine-driven equipment. The system helps implement predictive maintenance by trending vibration levels.Marine & Offshore
Used on shipboard turbines, propulsion systems, and offshore platform machinery to ensure operational reliability in harsh environments.Heavy Industry (Cement, Mining, Metals)
Monitors large fans, ID/FD fans, motor-driven compressors, and rolling mill equipment. Accessories like 138708-01 may be used for long-distance signal transmission in noisy electrical environments.
Key Features
Dual-channel design reduces rack space and wiring complexity.
API 670 compliance ensures suitability for critical machinery protection.
Integral gap voltage and OK circuit monitoring verifies probe health.
Flexible alarm settings with latching/non-latching, time delays, and voting logic.
Modular accessory integration (138708-01) for specific installation needs.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
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