Product Overview

The Bently Nevada 330101-48-71-20-02-05 is a specialized 8mm proximity sensor engineered for the 3300 XL transducer series. This eddy current probe is a critical component for non-contact displacement monitoring, specifically designed to capture high-resolution data on shaft vibration and axial position in rotating machinery. By observing the electromagnetic gap between the probe tip and the target material, it provides the essential analog signals required for Turbine Supervisory Instrumentation (TSI).

This specific probe configuration is optimized for stable performance in standard industrial environments, ensuring maximum machinery protection and operational safety. It is a fundamental tool for predictive maintenance strategies, allowing operators to detect early signs of bearing wear or mechanical instability in turbines, compressors, and high-speed pumps.

Key Technical Characteristics

• Precision Calibration Standards: Performance is optimized for use with an AISI 4140 steel target. To maintain the rated scale factor and linearity, a minimum target diameter of 31 mm is recommended.

• Stable Signal Response: The system exhibits exceptional power supply sensitivity, with less than 2 mV of output change per volt of input variance, ensuring signal integrity despite minor electrical fluctuations.

• Broad Electrical Compatibility: Designed to interface with the 3300 XL Proximitor sensor, which supports a wide supply voltage range from -17.5 Vdc to -26 Vdc (non-barrier) or -23 Vdc to -26 Vdc (with barriers).

• High System Interchangeability: Features the 3300 XL "universal match" design, allowing the probe to be used with standard extension cables and sensors without the need for manual recalibration.

• Robust Environmental Specs: Rated for operation at altitudes up to 2000 meters and maintains high accuracy within standardized ambient temperature ranges.

• Standardized System Length: This 2.0-meter lead probe is configured to work within 5-meter or 9-meter total system lengths, providing flexibility for various machine casing depths.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 330101-48-71-20-02-05

• Probe Diameter: 8 mm

• Mounting Thread: 3/8-24 UNF

• Lead Length: 2.0 Meters (6.6 feet)

• Linear Range: 2.0 mm (80 mils)

• Standard Scale Factor: 7.87 V/mm (200 mV/mil)

• Frequency Response: 0 Hz (DC) to 10 kHz

• Operating Temperature Range: -51°C to +177°C (Probe Tip)

• Power Supply Requirement: -24 Vdc Nominal

• Origin: USA

Industrial Applications

• Fluid-Film Bearing Monitoring: Continuous tracking of radial shaft vibration and thrust position.

• Turbo-Machinery Protection: Essential for the safe operation of steam turbines and centrifugal compressors.

• Phase Reference (Keyphasor): Providing precise timing pulses for rotational speed and vibration phase analysis.

• Asset Health Management: Supplying real-time analog data to Bently Nevada 3500 monitoring systems and System 1 software.