Bently Nevada 330905-00-25-05-02-00 – 3300 NSv Proximity Extension Cable for Machinery Vibration Monitoring

The Bently Nevada 330905-00-25-05-02-00 is a factory-terminated extension cable from the 3300 NSv proximity transducer family. It’s typically used to connect an NSv proximity probe to the matching Proximitor sensor in tight-access or small-target applications. From my experience, this model is a straightforward way to extend the probe reach on compressors, gearboxes, small-frame turbines, and any skid where space is at a premium but reliable shaft vibration or position data is still critical.

You might notice that this part number specifies a 25 ft (about 7.6 m) cable, which tends to be a sweet spot for many brownfield retrofits. It keeps signal integrity high without forcing you to coil excess length in the cabinet. One thing I appreciate is how the NSv cabling remains plug-and-play with the corresponding Bently Nevada NSv Proximitor hardware—less fiddling during outage windows and fewer surprises during commissioning.

Our Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery time: 1 week for in-stock, no more than one month at the latest
• Payment: 50% advance payment, full payment prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• NSv System Compatibility – Designed for the 3300 NSv proximity transducer system, commonly used on small targets and confined spaces.
• Factory-Terminated Connectors – Pre-fitted ends help reduce wiring mistakes and speed up installation in cabinets and junction boxes.
• 25 ft Cable Length – A practical length for most machinery skids; minimizes signal loss while avoiding excess slack.
• Rugged insulation – Built for industrial environments; typically handles oil mist, vibration, and cabinet temperatures reliably.
• Stable signal path – Maintains the probe-to-Proximitor analog path for consistent vibration and axial position measurements.

Technical Specifications

Brand / Model	Bently Nevada 330905-00-25-05-02-00
Product Type	3300 NSv proximity extension cable (factory-terminated)
HS Code	8544.20 (Coaxial cable)
Cable Length	25 ft (≈7.6 m)
Power Requirements	None (passive cable; powered by Proximitor/probe system)
Operating Temperature	Typically -51 to +177 °C for NSv cabling (application dependent)
Signal Type	Eddy-current proximity transducer analog signal path (probe to Proximitor)
Communication Interfaces	Not applicable (no digital comms)
Installation Method	Cable routed from NSv probe to NSv Proximitor; secure in conduit/tray; observe minimum bend radius

Application Fields

This NSv extension cable is commonly applied on:

• Compressors and expanders with small radial clearances
• Gas turbines and small steam turbines where probe access is limited
• Pumps and gearboxes in compact API skids
• General-purpose rotating equipment requiring proximity measurement in confined locations

A maintenance lead at a refinery told me they switched to NSv on two back-to-back compressors because of space, and the 25 ft cables simplified cabinet routing—fewer splices and far less troubleshooting after start-up.

Advantages & Value

• Reliability – Proven Bently Nevada signal path stability; fewer intermittent faults during outages.
• Compatibility – Matches 3300 NSv probes and Proximitor sensors; integrates cleanly with 3500 monitoring racks in many cases.
• Cost Control – Factory terminations typically reduce install time and rework, which saves labor during tight turnarounds.
• Support – Easy to specify and replace in the field; documentation and service are widely available.

Installation & Maintenance

• Environment – Route in metallic conduit or tray where possible; avoid hot spots and high-EMI sources (VFDs, large contactors).
• Panel/Cabinet – Use a ventilated cabinet for Proximitor modules; keep cable terminations clean and dry.
• Wiring – Do not cut or splice the cable; use the specified length. Observe a conservative bend radius (typically ≥25 mm) and strain relief at entry points.
• Grounding – Follow Bently Nevada grounding/shielding practices to minimize noise pickup.
• Routine Care – Periodically inspect connectors for contamination; re-seat during planned outages. Verify monitor readings after any mechanical work.
• Firmware/Calibration – While the cable itself needs no calibration, it’s good practice to verify Proximitor and monitor configuration after cable replacement.

Quality & Certifications

• Manufacturer-grade materials and terminations suitable for industrial environments
• Typically CE and RoHS compliant for most build options
• 1-year warranty (365 days) from our side

Common Companion Parts (for quick specifying)

• NSv Proximity Probe (3300 NSv series)
• NSv Proximitor Sensor (3300 NSv series)
• 3500/40M or 3500/42M monitor inputs for proximity transducers

If you’re standardizing on 25 ft runs for your skid layouts, this part number tends to eliminate measurement drift associated with improvised splices. It seems to be a small change that pays back quickly during commissioning and the first post-overhaul restart.