Bently Nevada 330850-90-05 Proximity Transducer Extension Cable – 90° connector, 5 m length for tight installations

The 330850-90-05 is a factory-calibrated Bently Nevada proximity transducer extension cable with a molded 90° connector and a 5 m length. It’s typically used between a 3300 XL proximity probe and a Proximitor Sensor in critical vibration and position monitoring loops feeding 3500-series and compatible protection systems. One thing I appreciate is how the right‑angle plug eases routing in cramped bearing housings or under machine guards—especially where a straight connector just won’t clear.

Order Placement Process and Guarantees

• Warranty: 365 days from delivery
• Lead time: 1 week for in‑stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 90° molded connector – Helps with clearance in tight spaces and reduces strain on the probe connection.
• Calibrated 5 m length – Maintains system accuracy when matched with the probe and Proximitor Sensor in standard 3300 XL chains.
• Robust industrial jacket – Designed for oil and plant environments; typically resists common lubricants and vibration.
• Low‑noise coaxial design – Preserves the eddy‑current signal quality for reliable shaft vibration and position measurements.
• Drop‑in compatibility – Works with Bently Nevada proximity probes and Proximitor Sensors used across turbomachinery and large rotating assets.
• Service-friendly – From my experience, a spare set of 5 m and 9 m cables covers most on-site retrofit needs.

Technical Specifications

Application Fields

You’ll typically find this cable in closed‑loop protection and condition monitoring on:

• Steam and gas turbines (main bearings, thrust position)
• Centrifugal compressors and expanders
• Large pumps and fans (balance-of-plant vibration points)
• Generators and motors where probe wiring must route through tight enclosures

Advantages & Value

• Reliable fit in tight spaces – The 90° end seems to be the quick fix when clearance behind a bearing housing is marginal.
• System accuracy preserved – Correct 5 m length helps maintain factory calibration across the probe–cable–Proximitor chain.
• Compatibility with installed base – Reduces setup time and avoids mixing non‑standard cables.
• Lower downtime – Swapping a damaged cable is faster than pulling a probe, which in many cases avoids re-machining mounts.
• Procurement simplicity – Standard length, straightforward part number, and stable availability.

A maintenance lead at a gas plant told us the 90° head “saved a full day” during a turnaround because it cleared a guard plate without redesigning the bracket—small detail, real impact.

Installation & Maintenance

• Cabinet and routing – Run in metallic conduit or tray where possible; separate from high‑voltage lines to minimize noise pickup.
• Bend radius – Avoid sharp bends; keep to a gentle radius (typically ≥25 mm) and relieve strain near connectors.
• Grounding and shielding – Maintain shield continuity and follow the Proximitor grounding scheme to prevent ground loops.
• Connector care – Keep connector faces clean and dry; finger‑tighten then snug gently—over‑torque can damage the interface.
• Periodic checks – Visual inspection for nicks or crushing each outage; verify transducer gap and bias voltage after cable replacement.
• Firmware and calibration – No firmware on the cable; when changing lengths, re‑confirm monitor settings and calibration as good practice.

Quality & Certifications

• Manufactured under ISO 9001 quality systems
• CE and RoHS compliance in most configurations
• Warranty: 365 days (replacement or repair as applicable)

Related Components Often Ordered Together

• Bently Nevada 330180 Proximitor Sensor (paired with 3300 XL probes/cables)
• Bently Nevada 3300 XL proximity probes (5 mm and 8 mm types, depending on the machine fit)
• Spare extension cables in alternative lengths (e.g., 7 m, 9 m) for site flexibility

If you’re standardizing spares, carrying a mix of 5 m and 9 m 90° cables typically covers most turbine and compressor points without rework.