Product Overview

The 330909-00-20-05-02-05 is a specialized Narrow Side View (NSv) proximity probe designed by Bently Nevada to resolve measurement challenges in high-density machinery environments. As a core component of the 3300 XL NSv Transducer System, this probe is specifically engineered for installations where standard 8mm probes encounter "side-view" interference or physical mounting constraints. With a compact 2.0-inch case and a focused magnetic field, it provides high-precision vibration and position data for small-diameter shafts and restricted target surfaces. This transducer is an essential link in Turbine Supervisory Instrumentation (TSI) chains, ensuring that even the most compact rotating components are monitored for mechanical health.

Technical Parameters and Hardware Architecture

The following specifications detail the physical build and electrical performance of the 330909-00-20-05-02-05 assembly:

• Model Number: 330909-00-20-05-02-05

• Case Length: 2.0 inches (Threaded)

• Integral Cable Length: 0.5 meters (20 inches)

• Connector Type: Miniature coaxial ClickLoc interface

• Linear Measurement Range: 1.5 mm (approximately 60 mils)

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

• Net Component Weight: 0.06 kg

• Package Dimensions: 1.8 cm x 1.6 cm x 123 cm

• Mounting Threads: 1/4-28 UNF

• Material Construction: High-resistance Polyphenylene Sulfide (PPS) tip

• Agency Approvals: Compatible with CSA, ATEX, and IECEx hazardous area standards

Specialized Machinery Deployment Scenarios

This NSv series probe is optimized for specific mechanical geometries where standard eddy current sensors would lose accuracy:

• Small Shaft Vibration Monitoring: Ideal for measuring radial vibration on rotor shafts with diameters smaller than 51 mm (2.0 inches).

• Restricted Counterbores: Designed for use in deep, narrow mounting holes where side-wall proximity would otherwise cause signal "cross-talk."

• Centrifugal Compressors: Frequently utilized in high-speed, compact gas and air compressors with limited internal clearances.

• Axial Position Tracking: Measuring thrust movement on small collars or shaft ends with a target area as small as 15 mm.

• Phase Reference (Keyphasor): Providing high-speed timing signals for machinery speed sensing and diagnostic phase analysis.

FAQ

Q: What is the primary benefit of the "Narrow Side View" (NSv) design?

The NSv design uses a tighter magnetic field, which allows the probe to be installed in very narrow spaces or counterbores without the metal walls interfering with the sensor's calibration or accuracy.

Q: Is the 330909-00-20-05-02-05 compatible with standard 3300 XL extension cables?

No, this probe must be paired with 3300 NSv-specific extension cables and Proximitor sensors to maintain the correct electrical impedance and scale factor.

Q: How does the ClickLoc connector improve reliability?

The ClickLoc connector is a miniature coaxial interface that provides a secure, vibration-proof connection while remaining small enough to be easily threaded through narrow conduit or machine housings.

Q: Can this probe operate in high-temperature oil environments?

Yes, the PPS tip and specialized cable jacket are engineered to withstand continuous exposure to industrial lubricants and the high temperatures typical of turbine bearing housings.

Q: Does this probe require manual calibration during installation?

Bently Nevada probes are factory-calibrated for interchangeability, so as long as the system length (probe plus extension cable) matches the Proximitor's requirements, no bench calibration is necessary.