BENTLY 330780-91-00 – Factory-Terminated Extension Cable for 3300 Series Proximity Transducer Systems

If you’re tying a Bently Nevada 3300/3300 XL proximity probe into its matching Proximitor sensor, the 330780-91-00 is the kind of factory-terminated extension cable that keeps the signal clean and the installation predictable. From my experience, using the matched Bently cable typically removes the guesswork around capacitance, shielding, and long-run stability—so your gap and vibration readings stay stable across operating conditions.

You might notice that the “-91” option usually indicates a specific factory length variant (often around the 9 m class). If your site standardizes on fixed lengths for API 670 work, this model tends to fit neatly into those practices, without field splicing.

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 before delivery
• Express delivery methods: FedEx, UPS, DHL

Key Features

• Genuine Bently Nevada compatibility – Mates with 3300/3300 XL proximity probes and Proximitor sensors for stable eddy-current measurements.
• Factory-terminated, shielded coax – Low-noise construction helps preserve signal integrity over longer runs, typically reducing drift and electrical interference.
• “-91” length option – Commonly used where standard cable lengths are mandated; minimizes the need for field splices.
• Rugged industrial jacket – Designed for routing through plant cable trays and protective conduit; seems to handle oils and typical plant environments well.
• Consistent capacitance – Maintains the transducer system’s calibration envelope, which in many cases improves repeatability of gap and vibration data.
• Traceable labeling – Simplifies maintenance and troubleshooting, especially when multiple probes share the same route.

Technical Specifications

Application Fields

Used anywhere 3300/3300 XL proximity systems are monitoring rotating assets. Typical sites include:

• Compressors, turbines, and large motors in oil & gas and petrochemical plants
• Steam and gas turbines in power generation
• Pumps, gearboxes, and fans in pulp & paper, metals, and mining
• General API 670 compliant condition monitoring skids

Advantages & Value

• Reliability you can trend on – Proper shielding and controlled capacitance usually mean cleaner baselines and fewer nuisance alarms.
• Compatibility, end-to-end – Designed to match Bently probes and Proximitor sensors; reduces calibration issues versus generic coax.
• Faster install – Factory terminations save field time and limit workmanship variability.
• Lower lifecycle risk – Using the specified cable often avoids subtle measurement drift that can lead to unnecessary shutdowns.

A maintenance lead at a refinery told us they chased a “slow drift” for weeks with a third‑party cable. Swapped to the 330780 option and the trace flattened out—nothing else in the train had to be touched. It’s a small detail that, in many cases, pays for itself during the next outage.

Installation & Maintenance

• Environment – Install in a clean, dry enclosure where possible. Follow cabinet standards for 24/7 industrial service and maintain ventilation to avoid hot spots.
• Routing – Keep separation from high-voltage and VFD power cables; maintain the recommended bend radius for the cable jacket.
• Grounding & shielding – Terminate shields as per Bently Nevada guidelines; avoid ground loops. In most cases, no field splices.
• Connections – Hand‑tighten to the manufacturer’s torque guidance; don’t over‑stress the connectors.
• Routine checks – Inspect for abrasion, moisture ingress, and connector looseness during outages; verify continuity if readings look erratic.
• System calibration – After cable replacement, perform the standard transducer system check and gap calibration before returning to service.

Quality & Certifications

• Manufacturer quality: Bently Nevada (Baker Hughes) production standards
• Typical compliance: CE; RoHS applicability depends on regional version
• When used with the matched probe and Proximitor, supports API 670 performance targets
• Warranty: 365 days

If you need confirmation on exact length, jacket material, or connector mating for your probe/Proximitor part numbers, share the full BOM and we’ll match it to the correct 330780-xx-xx build option before shipment.