Bently Nevada 330730-040-00-05 – 4 m Extension Cable for 3300 Series Proximity Transducer Systems

The Bently Nevada 330730-040-00-05 is a factory-grade extension cable designed for 3300/3500 proximity measurement systems. It connects the proximity probe to the Proximitor sensor, preserving signal integrity over distance. From my experience, this is the kind of cable you choose when you want stable, low-noise displacement signals on rotating assets—without second-guessing whether the cable is the weak link.

Company’s 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 method: 50% advance payment, full payment for delivery
• Express delivery methods: FedEx, UPS, DHL

Key Features

• Length-coded variant (040) – 4.0 m cable length that suits most cabinet-to-sensor layouts on skids and turbosets.
• Purpose-built for proximity systems – Maintains the calibrated relationship between probe and Proximitor for accurate shaft displacement.
• Low-noise triax construction – Typically used to minimize electrical interference from VFDs, soft starters, and high-current bus ducts.
• Chemically resistant jacket – Suitable for oil & gas, power, and process environments where oil mist and solvents are common.
• Click‑lock style terminations – Secure mating with Bently Nevada probe and Proximitor ends; you might notice fewer intermittent readings after upgrade.
• Drop‑in replacement – In many cases, installs without rerouting trays or changing clamps, keeping turnaround time short.

Technical Specifications

Application Fields

This cable is widely used on turbomachinery and critical rotating equipment where non-contact displacement and vibration monitoring is essential:

• Steam and gas turbines, compressors, blowers, and large motors
• API 670 compliant monitoring installations in oil & gas, petrochemical, and power plants
• Pumps and gearboxes where stable shaft position readings are needed for trip logic
• Revamps and brownfield upgrades where existing routing is kept and only the cable set is renewed

Advantages & Value

• Reliability in harsh areas – The construction typically resists oil mist, moderate chemicals, and elevated temperatures near bearings.
• Signal integrity – Low noise helps maintain linearity and sensitivity, reducing nuisance alarms on the monitor racks.
• Compatibility assurance – Length-matched to system calibration; avoids the measurement drift that often happens with non-matched cabling.
• Lower downtime – Straightforward swap; many users report faster commissioning since the connectors are keyed and secure.
• Procurement confidence – Traceable parts, documented test histories in most cases, and a clear warranty path.

Installation & Maintenance

• Environment – Install in a clean, dry cable tray or conduit where possible; avoid sharp edges and hot surfaces above rated temperatures.
• Routing – Keep separation from high-voltage and VFD motor leads; maintain gentle bend radius (typically ≥ 25 mm) to protect the dielectric.
• Terminations – Seat the connectors fully until locked; do not over-torque. If the cabinet is cramped, a right-angle connector adapter can help reduce strain.
• Wiring checks – During outages, inspect for abrasion, crushed sections, or loose runs. Replace if the jacket shows chemical swelling or cuts.
• Calibration practice – No calibration needed on the cable itself, but it’s wise to verify gap voltage and linear range on the full probe–cable–Proximitor loop after replacement.

Quality & Certifications

• Manufacturer quality system typically aligned with ISO standards for industrial monitoring hardware
• RoHS compliance in most variants; CE marking applies at the system level
• Warranty: 365 days (our coverage)

You might notice that when this cable replaces mixed or improvised wiring, the monitor trends settle down—particularly on machines with strong electromagnetic fields. One thing I appreciate is how predictable the readings become after putting the correct length-matched cable back in the loop.