Product Overview

The Bently Nevada 330103-00-13-20-12-05 is a 3300 XL 8 mm eddy-current proximity probe used for shaft vibration and displacement measurement in rotating machinery.

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

This configuration supports a 2-meter total system length, suitable for medium-distance installations between the probe and monitoring equipment.

Technical Specifications

Function and Working Principle

The probe operates using the eddy-current principle, where electromagnetic induction is used to measure distance changes between the probe tip and a conductive rotating shaft.

Operating Principle

1. Probe generates a high-frequency electromagnetic field
2. Eddy currents are induced in the shaft surface
3. Distance variation modifies signal response
4. Output voltage represents vibration and displacement

$x\propto V$

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

Key Functions

• Measures shaft vibration and radial displacement
• Enables real-time monitoring of rotating machinery condition
• Detects early mechanical faults such as:
  • Imbalance
  • Misalignment
  • Bearing wear
  • Shaft instability
• Supports machine protection and automatic shutdown systems

System Role

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

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

Together, they form a calibrated monitoring system used for:

• Vibration analysis
• Shaft position measurement
• Machinery protection inputs

Industrial Applications

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

Installation Guidelines

• Mounted near rotating shaft surface
• Requires accurate air-gap calibration
• Must maintain rigid mechanical alignment
• Medium cable routing (2 m) requires proper shielding
• EMI protection and grounding are essential
• Must be calibrated with matched system components

⚠️ Incorrect installation or mismatched system parts may result in inaccurate vibration readings.

Compatible System Components

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

Recommended Alternative Models

Key Advantages

• High-accuracy shaft vibration measurement
• Stable performance in industrial environments
• Proven eddy-current sensing technology
• Compatible with API 670 monitoring systems
• Reliable long-term operation
• Supports predictive maintenance strategies

Technical FAQs

Q1: What does this probe measure?
It measures shaft vibration and radial displacement in rotating machinery.

Q2: Is it a standalone device?
No, it requires a Proximitor sensor and extension cable system.

Q3: Why is system length important?
Because probe, cable, and Proximitor must be matched for proper calibration and signal accuracy.

Q4: Where is it typically used?
In turbines, compressors, pumps, generators, and other industrial rotating equipment.

Conclusion

The Bently Nevada 330103-00-13-20-12-05 3300 XL 8 mm Proximity Probe is a reliable eddy-current sensor designed for 2-meter system configurations. It provides precise vibration and displacement monitoring, supporting safe operation and predictive maintenance of critical rotating machinery in industrial environments.