Description

The Bently Nevada 330904-02-20-05-01-00 belongs to the specialized 3300 NSv (Narrow Side-View) Proximity Transducer System family. Engineers deploy this rugged hardware solution on industrial rotating machinery with highly restricted installation clearances. Specifically, it excels inside small centrifugal air compressors, refrigeration systems, and process gas assemblies where tight counterbores restrict standard 8 mm probes.

Suffix Part Number Breakdown

The specific option strings map directly to the following structural specifications:

• 330904: Base Model Number for the 3300 NSv Probe (M8 x 1 metric thread, with integrated armor).
• 02: 20 mm unthreaded case length.
• 20: 200 mm overall case length.
• 05: 0.5 metre (20 inches) total physical cable length.
• 01: Miniature coaxial ClickLoc connector with factory-installed connector protector and standard cable.
• 00: No specialized regional agency approvals required (Standard configuration).

Hardware Specifications

Eddy-Current Signal Conditioning and TSI Characteristics

The hardware executes automated eddy-current probe scaling to output a continuous high-frequency signal directly proportional to the physical gap between the probe tip and the observed conductive target. Because the NSv system optimizes its field for narrow areas, it delivers a precise incremental scale factor of 7.87 V/mm (200 mV/mil). This specialized side-view focus allows the system to monitor tight areas accurately, providing a 1.5 mm (60 mils) linear operating range.

Meanwhile, the high-frequency demodulation circuitry tracks rapid rotor dynamics, capturing critical metrics for radial vibration, axial thrust position, and phase reference (Keyphasor) indication. Furthermore, the probe tip design limits side-view field expansion, which actively prevents target signal distortion from nearby machine structural walls, bearing shoulders, or narrow counterbore limits.

Frequently Asked Questions

Q: What distinct advantage does the -01 connector option bring to this hardware setup?

A: The -01 option provides an integrated, rigid connector protector pre-installed over the ClickLoc joint. This protector shields the miniature coaxial connection against fluid ingress, oil exposure, and accidental grounding faults without requiring manual tape application.

Q: How does the flexible armor modify the mechanical installation of this probe?

A: The integrated stainless steel armor jacket surrounds the internal coaxial line completely. Consequently, this shell shields the delicate cable from sharp metal edges, pulling stress, and abrasive friction inside the machine enclosure.

Field Installation Guidelines

• Thread the M8 x 1 metric probe body into the mounting bracket, keeping installation torque within standard limits to avoid casing strain or thread stripping.
• Next, adjust the physical position of the probe tip relative to the target shaft until your monitoring instrument records a center gap voltage of approximately -7 VDC to -10 VDC.
• Subsequently, push the male and female ClickLoc connector halves together firmly until the internal spring mechanism clicks into place.
• After that, slide the integrated connector protector sleeve fully over the joined terminal cluster to seal out environment-based fluid films.
• Finally, route the armored 0.5-metre line toward the junction box, ensuring the pathway maintains a minimum static bend radius of 25.4 mm to protect the internal core.