Product Overview

The Bently Nevada 330105-XX-XX-10-02-05 (165931-01) is a 3300 XL 8 mm eddy-current proximity probe designed in a reverse mount configuration for shaft vibration and radial displacement monitoring in rotating machinery.

It is part of the Bently Nevada 3300 XL proximity transducer system, widely used in turbines, compressors, pumps, and generators for continuous condition monitoring and machine protection.

The reverse mount design allows installation in compact or mechanically constrained areas where standard probe orientation is not practical.

The 1-meter system length version is intended for medium-distance routing between the probe and signal conditioning equipment.

Technical Specifications

Function and Working Principle

The probe operates using the eddy-current principle, where a high-frequency electromagnetic field is generated at the probe tip. Changes in distance between the probe and conductive shaft modify eddy current losses, producing a proportional voltage output.

Operating Principle

1. Probe generates electromagnetic field
2. Eddy currents form in rotating shaft surface
3. Gap variation changes signal response
4. Output voltage reflects vibration and displacement

$x\propto V$

Where displacement (x) is proportional to the output voltage (V).

Key Functions

• Measures shaft vibration and radial displacement
• Provides continuous real-time machinery condition monitoring
• Detects early mechanical faults:
  • Rotor imbalance
  • Misalignment
  • Bearing wear
  • Shaft instability
• Supports automatic protection and shutdown systems

System Role

This probe is part of a complete 3300 XL measurement chain:

• Proximity probe (sensor head)
• Extension cable
• Proximitor sensor (signal conditioning module)

Together, they form a calibrated system used for:

• Vibration monitoring
• Shaft position measurement
• Machine protection inputs

Industrial Applications

• Steam turbines
• Gas turbines
• Compressors
• Pumps
• Generators
• Industrial fans
• Petrochemical rotating equipment
• Power generation systems

Installation Guidelines

• Designed for reverse mount installation orientation
• Suitable for compact or obstructed mechanical layouts
• Requires precise air-gap calibration
• 1-meter configuration supports moderate routing distances
• Proper shielding and grounding required to reduce EMI effects
• Must be installed with matched system components for calibration integrity

⚠️ Incorrect installation or mismatched components may lead to inaccurate vibration readings or protection system faults.

Compatible System Components

• Bently Nevada 3300 XL Proximitor sensors
• 3300 XL extension cables
• 3300 / 3500 monitoring systems
• Junction boxes and termination modules
• Industrial vibration and condition monitoring systems

Key Advantages

• Flexible reverse-mount installation design
• High-precision vibration and displacement measurement
• Stable eddy-current sensing performance
• Compatible with API 670 machinery protection systems
• Reliable operation in industrial environments
• Supports predictive maintenance strategies

Technical FAQs

Q1: What does the “XX-XX” mean in the model number?
It indicates configurable options such as system configuration details or ordering variations.

Q2: What is part number 165931-01?
It is the commercial or catalog reference number used for ordering and identification.

Q3: What does this probe measure?
It measures shaft vibration and radial displacement.

Q4: Is it a standalone device?
No, it must be used with a Proximitor sensor and extension cable system.

Conclusion

The Bently Nevada 330105-XX-XX-10-02-05 (165931-01) 3300 XL 8 mm Reverse Mount Probe is a medium-length (1 m) eddy-current sensor designed for constrained industrial installations. It delivers accurate vibration and displacement measurement, supporting reliable machine protection and predictive maintenance in critical rotating equipment.